Remove the in-process PDF viewer from pdf/

pdf/instance.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "pdf/instance.h"
-
-#include <algorithm>  // for min()
-#define _USE_MATH_DEFINES  // for M_PI
-#include <cmath>      // for log() and pow()
-#include <math.h>
-#include <list>
-
-#include "base/json/json_reader.h"
-#include "base/json/json_writer.h"
-#include "base/logging.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_split.h"
-#include "base/strings/string_util.h"
-#include "base/values.h"
-#include "chrome/common/content_restriction.h"
-#include "components/ui/zoom/page_zoom_constants.h"
-#include "content/public/common/page_zoom.h"
-#include "net/base/escape.h"
-#include "pdf/draw_utils.h"
-#include "pdf/number_image_generator.h"
-#include "pdf/pdf.h"
-#include "pdf/resource_consts.h"
-#include "ppapi/c/dev/ppb_cursor_control_dev.h"
-#include "ppapi/c/pp_errors.h"
-#include "ppapi/c/pp_rect.h"
-#include "ppapi/c/private/ppp_pdf.h"
-#include "ppapi/c/trusted/ppb_url_loader_trusted.h"
-#include "ppapi/cpp/core.h"
-#include "ppapi/cpp/dev/font_dev.h"
-#include "ppapi/cpp/dev/memory_dev.h"
-#include "ppapi/cpp/dev/text_input_dev.h"
-#include "ppapi/cpp/module.h"
-#include "ppapi/cpp/point.h"
-#include "ppapi/cpp/private/pdf.h"
-#include "ppapi/cpp/rect.h"
-#include "ppapi/cpp/resource.h"
-#include "ppapi/cpp/url_request_info.h"
-#include "ui/events/keycodes/keyboard_codes.h"
-
-#if defined(OS_MACOSX)
-#include "base/mac/mac_util.h"
-#endif
-
-namespace chrome_pdf {
-
-struct ToolbarButtonInfo {
-  uint32 id;
-  Button::ButtonStyle style;
-  PP_ResourceImage normal;
-  PP_ResourceImage highlighted;
-  PP_ResourceImage pressed;
-};
-
-const uint32 kBackgroundColor = 0xFFCCCCCC;
-
-namespace {
-
-// Uncomment following #define to enable thumbnails.
-// #define ENABLE_THUMBNAILS
-
-const uint32 kToolbarSplashTimeoutMs = 6000;
-const uint32 kMessageTextColor = 0xFF575757;
-const uint32 kMessageTextSize = 22;
-const uint32 kProgressFadeTimeoutMs = 250;
-const uint32 kProgressDelayTimeoutMs = 1000;
-const uint32 kAutoScrollTimeoutMs = 50;
-const double kAutoScrollFactor = 0.2;
-
-// Javascript methods.
-const char kJSAccessibility[] = "accessibility";
-const char kJSDocumentLoadComplete[] = "documentLoadComplete";
-const char kJSGetHeight[] = "getHeight";
-const char kJSGetHorizontalScrollbarThickness[] =
-    "getHorizontalScrollbarThickness";
-const char kJSGetPageLocationNormalized[] = "getPageLocationNormalized";
-const char kJSGetSelectedText[] = "getSelectedText";
-const char kJSGetVerticalScrollbarThickness[] = "getVerticalScrollbarThickness";
-const char kJSGetWidth[] = "getWidth";
-const char kJSGetZoomLevel[] = "getZoomLevel";
-const char kJSGoToPage[] = "goToPage";
-const char kJSGrayscale[] = "grayscale";
-const char kJSLoadPreviewPage[] = "loadPreviewPage";
-const char kJSOnLoad[] = "onload";
-const char kJSOnPluginSizeChanged[] = "onPluginSizeChanged";
-const char kJSOnScroll[] = "onScroll";
-const char kJSPageXOffset[] = "pageXOffset";
-const char kJSPageYOffset[] = "pageYOffset";
-const char kJSPrintPreviewPageCount[] = "printPreviewPageCount";
-const char kJSReload[] = "reload";
-const char kJSRemovePrintButton[] = "removePrintButton";
-const char kJSResetPrintPreviewUrl[] = "resetPrintPreviewUrl";
-const char kJSSendKeyEvent[] = "sendKeyEvent";
-const char kJSSetPageNumbers[] = "setPageNumbers";
-const char kJSSetPageXOffset[] = "setPageXOffset";
-const char kJSSetPageYOffset[] = "setPageYOffset";
-const char kJSSetZoomLevel[] = "setZoomLevel";
-const char kJSZoomFitToHeight[] = "fitToHeight";
-const char kJSZoomFitToWidth[] = "fitToWidth";
-const char kJSZoomIn[] = "zoomIn";
-const char kJSZoomOut[] = "zoomOut";
-
-// URL reference parameters.
-// For more possible parameters, see RFC 3778 and the "PDF Open Parameters"
-// document from Adobe.
-const char kDelimiters[] = "#&";
-const char kNamedDest[] = "nameddest";
-const char kPage[] = "page";
-
-const char kChromePrint[] = "chrome://print/";
-
-// Dictionary Value key names for the document accessibility info
-const char kAccessibleNumberOfPages[] = "numberOfPages";
-const char kAccessibleLoaded[] = "loaded";
-const char kAccessibleCopyable[] = "copyable";
-
-const ToolbarButtonInfo kPDFToolbarButtons[] = {
-  { kFitToPageButtonId, Button::BUTTON_STATE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
-  { kFitToWidthButtonId, Button::BUTTON_STATE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
-  { kZoomOutButtonId, Button::BUTTON_CLICKABLE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
-  { kZoomInButtonId, Button::BUTTON_CLICKABLE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_PRESSED },
-  { kSaveButtonId, Button::BUTTON_CLICKABLE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_SAVE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_PRESSED },
-  { kPrintButtonId, Button::BUTTON_CLICKABLE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_PRINT,
-      PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_PRESSED },
-};
-
-const ToolbarButtonInfo kPDFNoPrintToolbarButtons[] = {
-  { kFitToPageButtonId, Button::BUTTON_STATE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
-  { kFitToWidthButtonId, Button::BUTTON_STATE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
-  { kZoomOutButtonId, Button::BUTTON_CLICKABLE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
-  { kZoomInButtonId, Button::BUTTON_CLICKABLE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_PRESSED },
-  { kSaveButtonId, Button::BUTTON_CLICKABLE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_SAVE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_PRESSED },
-  { kPrintButtonId, Button::BUTTON_CLICKABLE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED,
-      PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED,
-      PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED }
-};
-
-const ToolbarButtonInfo kPrintPreviewToolbarButtons[] = {
-  { kFitToPageButtonId, Button::BUTTON_STATE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
-  { kFitToWidthButtonId, Button::BUTTON_STATE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
-  { kZoomOutButtonId, Button::BUTTON_CLICKABLE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
-  { kZoomInButtonId, Button::BUTTON_CLICKABLE,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END_HOVER,
-      PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END_PRESSED },
-};
-
-static const char kPPPPdfInterface[] = PPP_PDF_INTERFACE_1;
-
-PP_Var GetLinkAtPosition(PP_Instance instance, PP_Point point) {
-  pp::Var var;
-  void* object =
-      pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
-  if (object)
-    var = static_cast<Instance*>(object)->GetLinkAtPosition(pp::Point(point));
-  return var.Detach();
-}
-
-void Transform(PP_Instance instance, PP_PrivatePageTransformType type) {
-  void* object =
-      pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
-  if (object) {
-    Instance* obj_instance = static_cast<Instance*>(object);
-    switch (type) {
-      case PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CW:
-        obj_instance->RotateClockwise();
-        break;
-      case PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CCW:
-        obj_instance->RotateCounterclockwise();
-        break;
-    }
-  }
-}
-
-PP_Bool GetPrintPresetOptionsFromDocument(
-    PP_Instance instance,
-    PP_PdfPrintPresetOptions_Dev* options) {
-  void* object = pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
-  if (object) {
-    Instance* obj_instance = static_cast<Instance*>(object);
-    obj_instance->GetPrintPresetOptionsFromDocument(options);
-  }
-  return PP_TRUE;
-}
-
-const PPP_Pdf ppp_private = {
-  &GetLinkAtPosition,
-  &Transform,
-  &GetPrintPresetOptionsFromDocument
-};
-
-int ExtractPrintPreviewPageIndex(const std::string& src_url) {
-  // Sample |src_url| format: chrome://print/id/page_index/print.pdf
-  std::vector<std::string> url_substr;
-  base::SplitString(src_url.substr(strlen(kChromePrint)), '/', &url_substr);
-  if (url_substr.size() != 3)
-    return -1;
-
-  if (url_substr[2] != "print.pdf")
-    return -1;
-
-  int page_index = 0;
-  if (!base::StringToInt(url_substr[1], &page_index))
-    return -1;
-  return page_index;
-}
-
-bool IsPrintPreviewUrl(const std::string& url) {
-  return url.substr(0, strlen(kChromePrint)) == kChromePrint;
-}
-
-void ScalePoint(float scale, pp::Point* point) {
-  point->set_x(static_cast<int>(point->x() * scale));
-  point->set_y(static_cast<int>(point->y() * scale));
-}
-
-void ScaleRect(float scale, pp::Rect* rect) {
-  int left = static_cast<int>(floorf(rect->x() * scale));
-  int top = static_cast<int>(floorf(rect->y() * scale));
-  int right = static_cast<int>(ceilf((rect->x() + rect->width()) * scale));
-  int bottom = static_cast<int>(ceilf((rect->y() + rect->height()) * scale));
-  rect->SetRect(left, top, right - left, bottom - top);
-}
-
-template<class T>
-T ClipToRange(T value, T lower_boundary, T upper_boundary) {
-  DCHECK(lower_boundary <= upper_boundary);
-  return std::max<T>(lower_boundary, std::min<T>(value, upper_boundary));
-}
-
-}  // namespace
-
-Instance::Instance(PP_Instance instance)
-    : pp::InstancePrivate(instance),
-      pp::Find_Private(this),
-      pp::Printing_Dev(this),
-      pp::Selection_Dev(this),
-      pp::WidgetClient_Dev(this),
-      pp::Zoom_Dev(this),
-      cursor_(PP_CURSORTYPE_POINTER),
-      timer_pending_(false),
-      current_timer_id_(0),
-      zoom_(1.0),
-      device_scale_(1.0),
-      printing_enabled_(true),
-      hidpi_enabled_(false),
-      full_(IsFullFrame()),
-      zoom_mode_(full_ ? ZOOM_AUTO : ZOOM_SCALE),
-      did_call_start_loading_(false),
-      is_autoscroll_(false),
-      scrollbar_thickness_(-1),
-      scrollbar_reserved_thickness_(-1),
-      current_tb_info_(NULL),
-      current_tb_info_size_(0),
-      paint_manager_(this, this, true),
-      delayed_progress_timer_id_(0),
-      first_paint_(true),
-      painted_first_page_(false),
-      show_page_indicator_(false),
-      document_load_state_(LOAD_STATE_LOADING),
-      preview_document_load_state_(LOAD_STATE_COMPLETE),
-      told_browser_about_unsupported_feature_(false),
-      print_preview_page_count_(0) {
-  loader_factory_.Initialize(this);
-  timer_factory_.Initialize(this);
-  form_factory_.Initialize(this);
-  callback_factory_.Initialize(this);
-  engine_.reset(PDFEngine::Create(this));
-  pp::Module::Get()->AddPluginInterface(kPPPPdfInterface, &ppp_private);
-  AddPerInstanceObject(kPPPPdfInterface, this);
-
-  RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_MOUSE);
-  RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_WHEEL);
-  RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_KEYBOARD);
-  RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_TOUCH);
-}
-
-Instance::~Instance() {
-  if (timer_pending_) {
-    timer_factory_.CancelAll();
-    timer_pending_ = false;
-  }
-  // The engine may try to access this instance during its destruction.
-  // Make sure this happens early while the instance is still intact.
-  engine_.reset();
-  RemovePerInstanceObject(kPPPPdfInterface, this);
-}
-
-bool Instance::Init(uint32_t argc, const char* argn[], const char* argv[]) {
-  // For now, we hide HiDPI support behind a flag.
-  if (pp::PDF::IsFeatureEnabled(this, PP_PDFFEATURE_HIDPI))
-    hidpi_enabled_ = true;
-
-  printing_enabled_ = pp::PDF::IsFeatureEnabled(this, PP_PDFFEATURE_PRINTING);
-  if (printing_enabled_) {
-    CreateToolbar(kPDFToolbarButtons, arraysize(kPDFToolbarButtons));
-  } else {
-    CreateToolbar(kPDFNoPrintToolbarButtons,
-                  arraysize(kPDFNoPrintToolbarButtons));
-  }
-
-  CreateProgressBar();
-
-  // Load autoscroll anchor image.
-  autoscroll_anchor_ =
-      CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAN_SCROLL_ICON);
-
-#ifdef ENABLE_THUMBNAILS
-  CreateThumbnails();
-#endif
-  const char* url = NULL;
-  for (uint32_t i = 0; i < argc; ++i) {
-    if (strcmp(argn[i], "src") == 0) {
-      url = argv[i];
-      break;
-    }
-  }
-
-  if (!url)
-    return false;
-
-  CreatePageIndicator(IsPrintPreviewUrl(url));
-
-  if (!full_) {
-    // For PDFs embedded in a frame, we don't get the data automatically like we
-    // do for full-frame loads.  Start loading the data manually.
-    LoadUrl(url);
-  } else {
-    DCHECK(!did_call_start_loading_);
-    pp::PDF::DidStartLoading(this);
-    did_call_start_loading_ = true;
-  }
-
-  ZoomLimitsChanged(kMinZoom, kMaxZoom);
-
-  text_input_.reset(new pp::TextInput_Dev(this));
-
-  url_ = url;
-  return engine_->New(url);
-}
-
-bool Instance::HandleDocumentLoad(const pp::URLLoader& loader) {
-  delayed_progress_timer_id_ = ScheduleTimer(kProgressBarId,
-                                             kProgressDelayTimeoutMs);
-  return engine_->HandleDocumentLoad(loader);
-}
-
-bool Instance::HandleInputEvent(const pp::InputEvent& event) {
-  // To simplify things, convert the event into device coordinates if it is
-  // a mouse event.
-  pp::InputEvent event_device_res(event);
-  {
-    pp::MouseInputEvent mouse_event(event);
-    if (!mouse_event.is_null()) {
-      pp::Point point = mouse_event.GetPosition();
-      pp::Point movement = mouse_event.GetMovement();
-      ScalePoint(device_scale_, &point);
-      ScalePoint(device_scale_, &movement);
-      mouse_event = pp::MouseInputEvent(
-          this,
-          event.GetType(),
-          event.GetTimeStamp(),
-          event.GetModifiers(),
-          mouse_event.GetButton(),
-          point,
-          mouse_event.GetClickCount(),
-          movement);
-      event_device_res = mouse_event;
-    }
-  }
-
-  // Check if we need to go to autoscroll mode.
-  if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE &&
-     (event.GetModifiers() & PP_INPUTEVENT_MODIFIER_MIDDLEBUTTONDOWN)) {
-    pp::MouseInputEvent mouse_event(event_device_res);
-    pp::Point pos = mouse_event.GetPosition();
-    EnableAutoscroll(pos);
-    UpdateCursor(CalculateAutoscroll(pos));
-    return true;
-  } else {
-    // Quit autoscrolling on any other event.
-    DisableAutoscroll();
-  }
-
-#ifdef ENABLE_THUMBNAILS
-  if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSELEAVE)
-    thumbnails_.SlideOut();
-
-  if (thumbnails_.HandleEvent(event_device_res))
-    return true;
-#endif
-
-  if (!IsMouseOnScrollbar(event_device_res) &&
-      toolbar_->HandleEvent(event_device_res))
-    return true;
-
-#ifdef ENABLE_THUMBNAILS
-  if (v_scrollbar_.get() && event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE) {
-    pp::MouseInputEvent mouse_event(event);
-    pp::Point pt = mouse_event.GetPosition();
-    pp::Rect v_scrollbar_rc;
-    v_scrollbar_->GetLocation(&v_scrollbar_rc);
-    // There is a bug (https://bugs.webkit.org/show_bug.cgi?id=45208)
-    // in the webkit that makes event.u.mouse.button
-    // equal to PP_INPUTEVENT_MOUSEBUTTON_LEFT, even when no button is pressed.
-    // To work around this issue we use modifier for now, and will switch
-    // to button once the bug is fixed and webkit got merged back to our tree.
-    if (v_scrollbar_rc.Contains(pt) &&
-        (event.GetModifiers() & PP_INPUTEVENT_MODIFIER_LEFTBUTTONDOWN)) {
-      thumbnails_.SlideIn();
-    }
-
-    // When scrollbar is in the scrolling mode we should display thumbnails
-    // even the mouse is outside the thumbnail and scrollbar areas.
-    // If mouse is outside plugin area, we are still getting mouse move events
-    // while scrolling. See bug description for details:
-    // http://code.google.com/p/chromium/issues/detail?id=56444
-    if (!v_scrollbar_rc.Contains(pt) && thumbnails_.visible() &&
-        !(event.GetModifiers() & PP_INPUTEVENT_MODIFIER_LEFTBUTTONDOWN) &&
-        !thumbnails_.rect().Contains(pt)) {
-      thumbnails_.SlideOut();
-    }
-  }
-#endif
-
-  // Need to pass the event to the engine first, since if we're over an edit
-  // control we want it to get keyboard events (like space) instead of the
-  // scrollbar.
-  // TODO: will have to offset the mouse coordinates once we support bidi and
-  // there could be scrollbars on the left.
-  pp::InputEvent offset_event(event_device_res);
-  bool try_engine_first = true;
-  switch (offset_event.GetType()) {
-    case PP_INPUTEVENT_TYPE_MOUSEDOWN:
-    case PP_INPUTEVENT_TYPE_MOUSEUP:
-    case PP_INPUTEVENT_TYPE_MOUSEMOVE:
-    case PP_INPUTEVENT_TYPE_MOUSEENTER:
-    case PP_INPUTEVENT_TYPE_MOUSELEAVE: {
-      pp::MouseInputEvent mouse_event(event_device_res);
-      pp::MouseInputEvent mouse_event_dip(event);
-      pp::Point point = mouse_event.GetPosition();
-      point.set_x(point.x() - available_area_.x());
-      offset_event = pp::MouseInputEvent(
-          this,
-          event.GetType(),
-          event.GetTimeStamp(),
-          event.GetModifiers(),
-          mouse_event.GetButton(),
-          point,
-          mouse_event.GetClickCount(),
-          mouse_event.GetMovement());
-      if (!engine_->IsSelecting()) {
-        if (!IsOverlayScrollbar() &&
-            !available_area_.Contains(mouse_event.GetPosition())) {
-          try_engine_first = false;
-        } else if (IsOverlayScrollbar() && IsMouseOnScrollbar(event)) {
-            try_engine_first = false;
-        }
-      }
-      break;
-    }
-    default:
-      break;
-  }
-  if (try_engine_first && engine_->HandleEvent(offset_event))
-    return true;
-
-  // Left/Right arrows should scroll to the beginning of the Prev/Next page if
-  // there is no horizontal scroll bar.
-  // If fit-to-height, PgDown/PgUp should scroll to the beginning of the
-  // Prev/Next page. Spacebar / shift+spacebar should do the same.
-  if (v_scrollbar_.get() && event.GetType() == PP_INPUTEVENT_TYPE_KEYDOWN) {
-    pp::KeyboardInputEvent keyboard_event(event);
-    bool no_h_scrollbar = !h_scrollbar_.get();
-    uint32_t key_code = keyboard_event.GetKeyCode();
-    bool has_modifiers = keyboard_event.GetModifiers() != 0;
-    bool page_down =
-        no_h_scrollbar && !has_modifiers && key_code == ui::VKEY_RIGHT;
-    bool page_up =
-        no_h_scrollbar && !has_modifiers && key_code == ui::VKEY_LEFT;
-    if (zoom_mode_ == ZOOM_FIT_TO_PAGE) {
-      bool has_shift =
-          keyboard_event.GetModifiers() & PP_INPUTEVENT_MODIFIER_SHIFTKEY;
-      bool key_is_space = key_code == ui::VKEY_SPACE;
-      page_down |= key_is_space || key_code == ui::VKEY_NEXT;
-      page_up |= (key_is_space && has_shift) || (key_code == ui::VKEY_PRIOR);
-    }
-    if (page_down) {
-      int page = engine_->GetFirstVisiblePage();
-      if (page == -1)
-        return true;
-      // Engine calculates visible page including delimiter to the page size.
-      // We need to check here if the page itself is completely out of view and
-      // scroll to the next one in that case.
-      if (engine_->GetPageRect(page).bottom() * zoom_ <=
-          v_scrollbar_->GetValue())
-        page++;
-      ScrollToPage(page + 1);
-      UpdateCursor(PP_CURSORTYPE_POINTER);
-      return true;
-    } else if (page_up) {
-      int page = engine_->GetFirstVisiblePage();
-      if (page == -1)
-        return true;
-      if (engine_->GetPageRect(page).y() * zoom_ >= v_scrollbar_->GetValue())
-        page--;
-      ScrollToPage(page);
-      UpdateCursor(PP_CURSORTYPE_POINTER);
-      return true;
-    }
-  }
-
-  if (v_scrollbar_.get() && v_scrollbar_->HandleEvent(event)) {
-    UpdateCursor(PP_CURSORTYPE_POINTER);
-    return true;
-  }
-
-  if (h_scrollbar_.get() && h_scrollbar_->HandleEvent(event)) {
-    UpdateCursor(PP_CURSORTYPE_POINTER);
-    return true;
-  }
-
-  if (timer_pending_ &&
-      (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEUP ||
-       event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE)) {
-    timer_factory_.CancelAll();
-    timer_pending_ = false;
-  } else if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE &&
-             engine_->IsSelecting()) {
-    bool set_timer = false;
-    pp::MouseInputEvent mouse_event(event);
-    if (v_scrollbar_.get() &&
-        (mouse_event.GetPosition().y() <= 0 ||
-         mouse_event.GetPosition().y() >= (plugin_dip_size_.height() - 1))) {
-      v_scrollbar_->ScrollBy(
-          PP_SCROLLBY_LINE, mouse_event.GetPosition().y() >= 0 ? 1: -1);
-      set_timer = true;
-    }
-    if (h_scrollbar_.get() &&
-        (mouse_event.GetPosition().x() <= 0 ||
-         mouse_event.GetPosition().x() >= (plugin_dip_size_.width() - 1))) {
-      h_scrollbar_->ScrollBy(PP_SCROLLBY_LINE,
-          mouse_event.GetPosition().x() >= 0 ? 1: -1);
-      set_timer = true;
-    }
-
-    if (set_timer) {
-      last_mouse_event_ = pp::MouseInputEvent(event);
-
-      pp::CompletionCallback callback =
-          timer_factory_.NewCallback(&Instance::OnTimerFired);
-      pp::Module::Get()->core()->CallOnMainThread(kDragTimerMs, callback);
-      timer_pending_ = true;
-    }
-  }
-
-  if (event.GetType() == PP_INPUTEVENT_TYPE_KEYDOWN) {
-    pp::KeyboardInputEvent keyboard_event(event);
-    const uint32 modifier = event.GetModifiers();
-    if (modifier & kDefaultKeyModifier) {
-      switch (keyboard_event.GetKeyCode()) {
-        case 'A':
-          engine_->SelectAll();
-          return true;
-      }
-    }
-    if (modifier & PP_INPUTEVENT_MODIFIER_CONTROLKEY) {
-      switch (keyboard_event.GetKeyCode()) {
-        case ui::VKEY_OEM_4:
-          // Left bracket.
-          engine_->RotateCounterclockwise();
-          return true;
-        case ui::VKEY_OEM_6:
-          // Right bracket.
-          engine_->RotateClockwise();
-          return true;
-      }
-    }
-  }
-
-  // Return true for unhandled clicks so the plugin takes focus.
-  return (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEDOWN);
-}
-
-void Instance::DidChangeView(const pp::View& view) {
-  pp::Rect view_rect(view.GetRect());
-  float device_scale = 1.0f;
-  float old_device_scale = device_scale_;
-  if (hidpi_enabled_)
-    device_scale = view.GetDeviceScale();
-  pp::Size view_device_size(view_rect.width() * device_scale,
-                            view_rect.height() * device_scale);
-  if (view_device_size == plugin_size_ && device_scale == device_scale_)
-    return;  // We don't care about the position, only the size.
-
-  image_data_ = pp::ImageData();
-  device_scale_ = device_scale;
-  plugin_dip_size_ = view_rect.size();
-  plugin_size_ = view_device_size;
-
-  paint_manager_.SetSize(view_device_size, device_scale_);
-
-  image_data_ = pp::ImageData(this,
-                              PP_IMAGEDATAFORMAT_BGRA_PREMUL,
-                              plugin_size_,
-                              false);
-  if (image_data_.is_null()) {
-    DCHECK(plugin_size_.IsEmpty());
-    return;
-  }
-
-  // View dimensions changed, disable autoscroll (if it was enabled).
-  DisableAutoscroll();
-
-  OnGeometryChanged(zoom_, old_device_scale);
-}
-
-pp::Var Instance::GetInstanceObject() {
-  if (instance_object_.is_undefined()) {
-    PDFScriptableObject* object = new PDFScriptableObject(this);
-    // The pp::Var takes ownership of object here.
-    instance_object_ = pp::VarPrivate(this, object);
-  }
-
-  return instance_object_;
-}
-
-void Instance::GetPrintPresetOptionsFromDocument(
-    PP_PdfPrintPresetOptions_Dev* options) {
-  options->is_scaling_disabled = PP_FromBool(IsPrintScalingDisabled());
-  options->duplex =
-      static_cast<PP_PrivateDuplexMode_Dev>(engine_->GetDuplexType());
-  options->copies = engine_->GetCopiesToPrint();
-  pp::Size uniform_page_size;
-  options->is_page_size_uniform =
-      PP_FromBool(engine_->GetPageSizeAndUniformity(&uniform_page_size));
-  options->uniform_page_size = PP_Size(uniform_page_size);
-}
-
-pp::Var Instance::GetLinkAtPosition(const pp::Point& point) {
-  pp::Point offset_point(point);
-  ScalePoint(device_scale_, &offset_point);
-  offset_point.set_x(offset_point.x() - available_area_.x());
-  return engine_->GetLinkAtPosition(offset_point);
-}
-
-pp::Var Instance::GetSelectedText(bool html) {
-  if (html)
-    return pp::Var();
-  return engine_->GetSelectedText();
-}
-
-void Instance::InvalidateWidget(pp::Widget_Dev widget,
-                                const pp::Rect& dirty_rect) {
-  if (v_scrollbar_.get() && *v_scrollbar_ == widget) {
-    if (!image_data_.is_null())
-      v_scrollbar_->Paint(dirty_rect.pp_rect(), &image_data_);
-  } else if (h_scrollbar_.get() && *h_scrollbar_ == widget) {
-    if (!image_data_.is_null())
-      h_scrollbar_->Paint(dirty_rect.pp_rect(), &image_data_);
-  } else {
-    // Possible to hit this condition since sometimes the scrollbar codes posts
-    // a task to do something later, and we could have deleted our reference in
-    // the meantime.
-    return;
-  }
-
-  pp::Rect dirty_rect_scaled = dirty_rect;
-  ScaleRect(device_scale_, &dirty_rect_scaled);
-  paint_manager_.InvalidateRect(dirty_rect_scaled);
-}
-
-void Instance::ScrollbarValueChanged(pp::Scrollbar_Dev scrollbar,
-                                     uint32_t value) {
-  value = GetScaled(value);
-  if (v_scrollbar_.get() && *v_scrollbar_ == scrollbar) {
-    engine_->ScrolledToYPosition(value);
-    pp::Rect rc;
-    v_scrollbar_->GetLocation(&rc);
-    int32 doc_height = GetDocumentPixelHeight();
-    doc_height -= GetScaled(rc.height());
-#ifdef ENABLE_THUMBNAILS
-    if (thumbnails_.visible()) {
-      thumbnails_.SetPosition(value, doc_height, true);
-    }
-#endif
-    pp::Point origin(
-        plugin_size_.width() - page_indicator_.rect().width() -
-            GetScaled(GetScrollbarReservedThickness()),
-        page_indicator_.GetYPosition(value, doc_height, plugin_size_.height()));
-    page_indicator_.MoveTo(origin, page_indicator_.visible());
-  } else if (h_scrollbar_.get() && *h_scrollbar_ == scrollbar) {
-    engine_->ScrolledToXPosition(value);
-  }
-}
-
-void Instance::ScrollbarOverlayChanged(pp::Scrollbar_Dev scrollbar,
-                                       bool overlay) {
-  scrollbar_reserved_thickness_ = overlay ? 0 : scrollbar_thickness_;
-  OnGeometryChanged(zoom_, device_scale_);
-}
-
-uint32_t Instance::QuerySupportedPrintOutputFormats() {
-  return engine_->QuerySupportedPrintOutputFormats();
-}
-
-int32_t Instance::PrintBegin(const PP_PrintSettings_Dev& print_settings) {
-  // For us num_pages is always equal to the number of pages in the PDF
-  // document irrespective of the printable area.
-  int32_t ret = engine_->GetNumberOfPages();
-  if (!ret)
-    return 0;
-
-  uint32_t supported_formats = engine_->QuerySupportedPrintOutputFormats();
-  if ((print_settings.format & supported_formats) == 0)
-    return 0;
-
-  print_settings_.is_printing = true;
-  print_settings_.pepper_print_settings = print_settings;
-  engine_->PrintBegin();
-  return ret;
-}
-
-pp::Resource Instance::PrintPages(
-    const PP_PrintPageNumberRange_Dev* page_ranges,
-    uint32_t page_range_count) {
-  if (!print_settings_.is_printing)
-    return pp::Resource();
-
-  print_settings_.print_pages_called_ = true;
-  return engine_->PrintPages(page_ranges, page_range_count,
-                             print_settings_.pepper_print_settings);
-}
-
-void Instance::PrintEnd() {
-  if (print_settings_.print_pages_called_)
-    UserMetricsRecordAction("PDF.PrintPage");
-  print_settings_.Clear();
-  engine_->PrintEnd();
-}
-
-bool Instance::IsPrintScalingDisabled() {
-  return !engine_->GetPrintScaling();
-}
-
-bool Instance::StartFind(const std::string& text, bool case_sensitive) {
-  engine_->StartFind(text.c_str(), case_sensitive);
-  return true;
-}
-
-void Instance::SelectFindResult(bool forward) {
-  engine_->SelectFindResult(forward);
-}
-
-void Instance::StopFind() {
-  engine_->StopFind();
-}
-
-void Instance::Zoom(double scale, bool text_only) {
-  UserMetricsRecordAction("PDF.ZoomFromBrowser");
-
-  // If the zoom level doesn't change it means that this zoom change might have
-  // been initiated by the plugin. In that case, we don't want to change the
-  // zoom mode to ZOOM_SCALE as it may have been intentionally set to
-  // ZOOM_FIT_TO_PAGE or some other value when the zoom was last changed.
-  if (scale == zoom_)
-    return;
-
-  SetZoom(ZOOM_SCALE, scale);
-}
-
-void Instance::ZoomChanged(double factor) {
-  if (full_)
-    Zoom_Dev::ZoomChanged(factor);
-}
-
-void Instance::OnPaint(const std::vector<pp::Rect>& paint_rects,
-                       std::vector<PaintManager::ReadyRect>* ready,
-                       std::vector<pp::Rect>* pending) {
-  if (image_data_.is_null()) {
-    DCHECK(plugin_size_.IsEmpty());
-    return;
-  }
-  if (first_paint_) {
-    first_paint_ = false;
-    pp::Rect rect = pp::Rect(pp::Point(), plugin_size_);
-    FillRect(rect, kBackgroundColor);
-    ready->push_back(PaintManager::ReadyRect(rect, image_data_, true));
-    *pending = paint_rects;
-    return;
-  }
-
-  engine_->PrePaint();
-
-  for (size_t i = 0; i < paint_rects.size(); i++) {
-    // Intersect with plugin area since there could be pending invalidates from
-    // when the plugin area was larger.
-    pp::Rect rect =
-        paint_rects[i].Intersect(pp::Rect(pp::Point(), plugin_size_));
-    if (rect.IsEmpty())
-      continue;
-
-    pp::Rect pdf_rect = available_area_.Intersect(rect);
-    if (!pdf_rect.IsEmpty()) {
-      pdf_rect.Offset(available_area_.x() * -1, 0);
-
-      std::vector<pp::Rect> pdf_ready;
-      std::vector<pp::Rect> pdf_pending;
-      engine_->Paint(pdf_rect, &image_data_, &pdf_ready, &pdf_pending);
-      for (size_t j = 0; j < pdf_ready.size(); ++j) {
-        pdf_ready[j].Offset(available_area_.point());
-        ready->push_back(
-            PaintManager::ReadyRect(pdf_ready[j], image_data_, false));
-      }
-      for (size_t j = 0; j < pdf_pending.size(); ++j) {
-        pdf_pending[j].Offset(available_area_.point());
-        pending->push_back(pdf_pending[j]);
-      }
-    }
-
-    for (size_t j = 0; j < background_parts_.size(); ++j) {
-      pp::Rect intersection = background_parts_[j].location.Intersect(rect);
-      if (!intersection.IsEmpty()) {
-        FillRect(intersection, background_parts_[j].color);
-        ready->push_back(
-            PaintManager::ReadyRect(intersection, image_data_, false));
-      }
-    }
-
-    if (document_load_state_ == LOAD_STATE_FAILED) {
-      pp::Point top_center;
-      top_center.set_x(plugin_size_.width() / 2);
-      top_center.set_y(plugin_size_.height() / 2);
-      DrawText(top_center, PP_RESOURCESTRING_PDFLOAD_FAILED);
-    }
-
-#ifdef ENABLE_THUMBNAILS
-    thumbnails_.Paint(&image_data_, rect);
-#endif
-  }
-
-  engine_->PostPaint();
-
-  // Must paint scrollbars after the background parts, in case we have an
-  // overlay scrollbar that's over the background. We also do this in a separate
-  // loop because the scrollbar painting logic uses the signal of whether there
-  // are pending paints or not to figure out if it should draw right away or
-  // not.
-  for (size_t i = 0; i < paint_rects.size(); i++) {
-    PaintIfWidgetIntersects(h_scrollbar_.get(), paint_rects[i], ready, pending);
-    PaintIfWidgetIntersects(v_scrollbar_.get(), paint_rects[i], ready, pending);
-  }
-
-  if (progress_bar_.visible())
-    PaintOverlayControl(&progress_bar_, &image_data_, ready);
-
-  if (page_indicator_.visible())
-    PaintOverlayControl(&page_indicator_, &image_data_, ready);
-
-  if (toolbar_->current_transparency() != kTransparentAlpha)
-    PaintOverlayControl(toolbar_.get(), &image_data_, ready);
-
-  // Paint autoscroll anchor if needed.
-  if (is_autoscroll_) {
-    size_t limit = ready->size();
-    for (size_t i = 0; i < limit; i++) {
-      pp::Rect anchor_rect = autoscroll_rect_.Intersect((*ready)[i].rect);
-      if (!anchor_rect.IsEmpty()) {
-        pp::Rect draw_rc = pp::Rect(
-            pp::Point(anchor_rect.x() - autoscroll_rect_.x(),
-                      anchor_rect.y() - autoscroll_rect_.y()),
-            anchor_rect.size());
-        // Paint autoscroll anchor.
-        AlphaBlend(autoscroll_anchor_, draw_rc,
-                   &image_data_, anchor_rect.point(), kOpaqueAlpha);
-      }
-    }
-  }
-}
-
-void Instance::PaintOverlayControl(
-    Control* ctrl,
-    pp::ImageData* image_data,
-    std::vector<PaintManager::ReadyRect>* ready) {
-  // Make sure that we only paint overlay controls over an area that's ready,
-  // i.e. not pending.  Otherwise we'll mark the control rect as ready and
-  // it'll overwrite the pdf region.
-  std::list<pp::Rect> ctrl_rects;
-  for (size_t i = 0; i < ready->size(); i++) {
-    pp::Rect rc = ctrl->rect().Intersect((*ready)[i].rect);
-    if (!rc.IsEmpty())
-      ctrl_rects.push_back(rc);
-  }
-
-  if (!ctrl_rects.empty()) {
-    ctrl->PaintMultipleRects(image_data, ctrl_rects);
-
-    std::list<pp::Rect>::iterator iter;
-    for (iter = ctrl_rects.begin(); iter != ctrl_rects.end(); ++iter) {
-      ready->push_back(PaintManager::ReadyRect(*iter, *image_data, false));
-    }
-  }
-}
-
-void Instance::DidOpen(int32_t result) {
-  if (result == PP_OK) {
-    engine_->HandleDocumentLoad(embed_loader_);
-  } else if (result != PP_ERROR_ABORTED) {  // Can happen in tests.
-    NOTREACHED();
-  }
-}
-
-void Instance::DidOpenPreview(int32_t result) {
-  if (result == PP_OK) {
-    preview_engine_.reset(PDFEngine::Create(new PreviewModeClient(this)));
-    preview_engine_->HandleDocumentLoad(embed_preview_loader_);
-  } else {
-    NOTREACHED();
-  }
-}
-
-void Instance::PaintIfWidgetIntersects(
-    pp::Widget_Dev* widget,
-    const pp::Rect& rect,
-    std::vector<PaintManager::ReadyRect>* ready,
-    std::vector<pp::Rect>* pending) {
-  if (!widget)
-    return;
-
-  pp::Rect location;
-  if (!widget->GetLocation(&location))
-    return;
-
-  ScaleRect(device_scale_, &location);
-  location = location.Intersect(rect);
-  if (location.IsEmpty())
-    return;
-
-  if (IsOverlayScrollbar()) {
-    // If we're using overlay scrollbars, and there are pending paints under the
-    // scrollbar, don't update the scrollbar instantly. While it would be nice,
-    // we would need to double buffer the plugin area in order to make this
-    // work. This is because we'd need to always have a copy of what the pdf
-    // under the scrollbar looks like, and additionally we couldn't paint the
-    // pdf under the scrollbar if it's ready until we got the preceding flush.
-    // So in practice, it would make painting slower and introduce extra buffer
-    // copies for the general case.
-    for (size_t i = 0; i < pending->size(); ++i) {
-      if ((*pending)[i].Intersects(location))
-        return;
-    }
-
-    // Even if none of the pending paints are under the scrollbar, we never want
-    // to paint it if it's over the pdf if there are other pending paints.
-    // Otherwise different parts of the pdf plugin would display at different
-    // scroll offsets.
-    if (!pending->empty() && available_area_.Intersects(rect)) {
-      pending->push_back(location);
-      return;
-    }
-  }
-
-  pp::Rect location_dip = location;
-  ScaleRect(1.0f / device_scale_, &location_dip);
-
-  DCHECK(!image_data_.is_null());
-  widget->Paint(location_dip, &image_data_);
-
-  ready->push_back(PaintManager::ReadyRect(location, image_data_, true));
-}
-
-void Instance::OnTimerFired(int32_t) {
-  HandleInputEvent(last_mouse_event_);
-}
-
-void Instance::OnClientTimerFired(int32_t id) {
-  engine_->OnCallback(id);
-}
-
-void Instance::OnControlTimerFired(int32_t,
-                                   const uint32& control_id,
-                                   const uint32& timer_id) {
-  if (control_id == toolbar_->id()) {
-    toolbar_->OnTimerFired(timer_id);
-  } else if (control_id == progress_bar_.id()) {
-    if (timer_id == delayed_progress_timer_id_) {
-      if (document_load_state_ == LOAD_STATE_LOADING &&
-          !progress_bar_.visible()) {
-        progress_bar_.Fade(true, kProgressFadeTimeoutMs);
-      }
-      delayed_progress_timer_id_ = 0;
-    } else {
-      progress_bar_.OnTimerFired(timer_id);
-    }
-  } else if (control_id == kAutoScrollId) {
-    if (is_autoscroll_) {
-      if (autoscroll_x_ != 0 && h_scrollbar_.get()) {
-        h_scrollbar_->ScrollBy(PP_SCROLLBY_PIXEL, autoscroll_x_);
-      }
-      if (autoscroll_y_ != 0 && v_scrollbar_.get()) {
-        v_scrollbar_->ScrollBy(PP_SCROLLBY_PIXEL, autoscroll_y_);
-      }
-
-      // Reschedule timer.
-      ScheduleTimer(kAutoScrollId, kAutoScrollTimeoutMs);
-    }
-  } else if (control_id == kPageIndicatorId) {
-    page_indicator_.OnTimerFired(timer_id);
-  }
-#ifdef ENABLE_THUMBNAILS
-  else if (control_id == thumbnails_.id()) {
-    thumbnails_.OnTimerFired(timer_id);
-  }
-#endif
-}
-
-void Instance::CalculateBackgroundParts() {
-  background_parts_.clear();
-  int v_scrollbar_thickness =
-      GetScaled(v_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
-  int h_scrollbar_thickness =
-      GetScaled(h_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
-  int width_without_scrollbar = std::max(
-      plugin_size_.width() - v_scrollbar_thickness, 0);
-  int height_without_scrollbar = std::max(
-      plugin_size_.height() - h_scrollbar_thickness, 0);
-  int left_width = available_area_.x();
-  int right_start = available_area_.right();
-  int right_width = abs(width_without_scrollbar - available_area_.right());
-  int bottom = std::min(available_area_.bottom(), height_without_scrollbar);
-
-  // Add the left, right, and bottom rectangles.  Note: we assume only
-  // horizontal centering.
-  BackgroundPart part = {
-    pp::Rect(0, 0, left_width, bottom),
-    kBackgroundColor
-  };
-  if (!part.location.IsEmpty())
-    background_parts_.push_back(part);
-  part.location = pp::Rect(right_start, 0, right_width, bottom);
-  if (!part.location.IsEmpty())
-    background_parts_.push_back(part);
-  part.location = pp::Rect(
-      0, bottom, width_without_scrollbar, height_without_scrollbar - bottom);
-  if (!part.location.IsEmpty())
-    background_parts_.push_back(part);
-
-  if (h_scrollbar_thickness
-#if defined(OS_MACOSX)
-      ||
-#else
-      &&
-#endif
-      v_scrollbar_thickness) {
-    part.color = 0xFFFFFFFF;
-    part.location = pp::Rect(plugin_size_.width() - v_scrollbar_thickness,
-                             plugin_size_.height() - h_scrollbar_thickness,
-                             h_scrollbar_thickness,
-                             v_scrollbar_thickness);
-    background_parts_.push_back(part);
-  }
-}
-
-int Instance::GetDocumentPixelWidth() const {
-  return static_cast<int>(ceil(document_size_.width() * zoom_ * device_scale_));
-}
-
-int Instance::GetDocumentPixelHeight() const {
-  return static_cast<int>(ceil(document_size_.height() *
-                               zoom_ *
-                               device_scale_));
-}
-
-void Instance::FillRect(const pp::Rect& rect, uint32 color) {
-  DCHECK(!image_data_.is_null() || rect.IsEmpty());
-  uint32* buffer_start = static_cast<uint32*>(image_data_.data());
-  int stride = image_data_.stride();
-  uint32* ptr = buffer_start + rect.y() * stride / 4 + rect.x();
-  int height = rect.height();
-  int width = rect.width();
-  for (int y = 0; y < height; ++y) {
-    for (int x = 0; x < width; ++x)
-      *(ptr + x) = color;
-    ptr += stride / 4;
-  }
-}
-
-void Instance::DocumentSizeUpdated(const pp::Size& size) {
-  document_size_ = size;
-
-  OnGeometryChanged(zoom_, device_scale_);
-}
-
-void Instance::Invalidate(const pp::Rect& rect) {
-  pp::Rect offset_rect(rect);
-  offset_rect.Offset(available_area_.point());
-  paint_manager_.InvalidateRect(offset_rect);
-}
-
-void Instance::Scroll(const pp::Point& point) {
-  pp::Rect scroll_area = available_area_;
-  if (IsOverlayScrollbar()) {
-    pp::Rect rc;
-    if (h_scrollbar_.get()) {
-      h_scrollbar_->GetLocation(&rc);
-      ScaleRect(device_scale_, &rc);
-      if (scroll_area.bottom() > rc.y()) {
-        scroll_area.set_height(rc.y() - scroll_area.y());
-        paint_manager_.InvalidateRect(rc);
-      }
-    }
-    if (v_scrollbar_.get()) {
-      v_scrollbar_->GetLocation(&rc);
-      ScaleRect(device_scale_, &rc);
-      if (scroll_area.right() > rc.x()) {
-        scroll_area.set_width(rc.x() - scroll_area.x());
-        paint_manager_.InvalidateRect(rc);
-      }
-    }
-  }
-  paint_manager_.ScrollRect(scroll_area, point);
-
-  if (toolbar_->current_transparency() != kTransparentAlpha)
-    paint_manager_.InvalidateRect(toolbar_->GetControlsRect());
-
-  if (progress_bar_.visible())
-    paint_manager_.InvalidateRect(progress_bar_.rect());
-
-  if (is_autoscroll_)
-    paint_manager_.InvalidateRect(autoscroll_rect_);
-
-  if (show_page_indicator_) {
-    page_indicator_.set_current_page(GetPageNumberToDisplay());
-    page_indicator_.Splash();
-  }
-
-  if (page_indicator_.visible())
-    paint_manager_.InvalidateRect(page_indicator_.rect());
-
-  // Run the scroll callback asynchronously. This function can be invoked by a
-  // layout change which should not re-enter into JS synchronously.
-  pp::CompletionCallback callback =
-      callback_factory_.NewCallback(&Instance::RunCallback,
-                                    on_scroll_callback_);
-  pp::Module::Get()->core()->CallOnMainThread(0, callback);
-}
-
-void Instance::ScrollToX(int position) {
-  if (!h_scrollbar_.get()) {
-    NOTREACHED();
-    return;
-  }
-  int position_dip = static_cast<int>(position / device_scale_);
-  h_scrollbar_->SetValue(position_dip);
-}
-
-void Instance::ScrollToY(int position) {
-  if (!v_scrollbar_.get()) {
-    NOTREACHED();
-    return;
-  }
-  int position_dip = static_cast<int>(position / device_scale_);
-  v_scrollbar_->SetValue(ClipToRange(position_dip, 0, valid_v_range_));
-}
-
-void Instance::ScrollToPage(int page) {
-  if (!v_scrollbar_.get())
-    return;
-
-  if (engine_->GetNumberOfPages() == 0)
-    return;
-
-  int index = ClipToRange(page, 0, engine_->GetNumberOfPages() - 1);
-  pp::Rect rect = engine_->GetPageRect(index);
-  // If we are trying to scroll pass the last page,
-  // scroll to the end of the last page.
-  int position = index < page ? rect.bottom() : rect.y();
-  ScrollToY(position * zoom_ * device_scale_);
-}
-
-void Instance::NavigateTo(const std::string& url, bool open_in_new_tab) {
-  std::string url_copy(url);
-
-  // Empty |url_copy| is ok, and will effectively be a reload.
-  // Skip the code below so an empty URL does not turn into "http://", which
-  // will cause GURL to fail a DCHECK.
-  if (!url_copy.empty()) {
-    // If |url_copy| starts with '#', then it's for the same URL with a
-    // different URL fragment.
-    if (url_copy[0] == '#') {
-      // if '#' is already present in |url_| then remove old fragment and add
-      // new |url_copy| fragment.
-      std::size_t index = url_.find('#');
-      if (index != std::string::npos)
-        url_copy = url_.substr(0, index) + url_copy;
-      else
-        url_copy = url_ + url_copy;
-      // Changing the href does not actually do anything when navigating in the
-      // same tab, so do the actual page scroll here. Then fall through so the
-      // href gets updated.
-      if (!open_in_new_tab) {
-        int page_number = GetInitialPage(url_copy);
-        if (page_number >= 0)
-          ScrollToPage(page_number);
-      }
-    }
-    // If there's no scheme, add http.
-    if (url_copy.find("://") == std::string::npos &&
-        url_copy.find("mailto:") == std::string::npos) {
-      url_copy = "http://" + url_copy;
-    }
-    // Make sure |url_copy| starts with a valid scheme.
-    if (url_copy.find("http://") != 0 &&
-        url_copy.find("https://") != 0 &&
-        url_copy.find("ftp://") != 0 &&
-        url_copy.find("file://") != 0 &&
-        url_copy.find("mailto:") != 0) {
-      return;
-    }
-    // Make sure |url_copy| is not only a scheme.
-    if (url_copy == "http://" ||
-        url_copy == "https://" ||
-        url_copy == "ftp://" ||
-        url_copy == "file://" ||
-        url_copy == "mailto:") {
-      return;
-    }
-  }
-  if (open_in_new_tab) {
-    GetWindowObject().Call("open", url_copy);
-  } else {
-    GetWindowObject().GetProperty("top").GetProperty("location").
-        SetProperty("href", url_copy);
-  }
-}
-
-void Instance::UpdateCursor(PP_CursorType_Dev cursor) {
-  if (cursor == cursor_)
-    return;
-  cursor_ = cursor;
-
-  const PPB_CursorControl_Dev* cursor_interface =
-      reinterpret_cast<const PPB_CursorControl_Dev*>(
-      pp::Module::Get()->GetBrowserInterface(PPB_CURSOR_CONTROL_DEV_INTERFACE));
-  if (!cursor_interface) {
-    NOTREACHED();
-    return;
-  }
-
-  cursor_interface->SetCursor(
-      pp_instance(), cursor_, pp::ImageData().pp_resource(), NULL);
-}
-
-void Instance::UpdateTickMarks(const std::vector<pp::Rect>& tickmarks) {
-  if (!v_scrollbar_.get())
-    return;
-
-  float inverse_scale = 1.0f / device_scale_;
-  std::vector<pp::Rect> scaled_tickmarks = tickmarks;
-  for (size_t i = 0; i < scaled_tickmarks.size(); i++) {
-    ScaleRect(inverse_scale, &scaled_tickmarks[i]);
-  }
-
-  v_scrollbar_->SetTickMarks(
-      scaled_tickmarks.empty() ? NULL : &scaled_tickmarks[0], tickmarks.size());
-}
-
-void Instance::NotifyNumberOfFindResultsChanged(int total, bool final_result) {
-  NumberOfFindResultsChanged(total, final_result);
-}
-
-void Instance::NotifySelectedFindResultChanged(int current_find_index) {
-  DCHECK_GE(current_find_index, 0);
-  SelectedFindResultChanged(current_find_index);
-}
-
-void Instance::OnEvent(uint32 control_id, uint32 event_id, void* data) {
-  if (event_id == Button::EVENT_ID_BUTTON_CLICKED ||
-      event_id == Button::EVENT_ID_BUTTON_STATE_CHANGED) {
-    switch (control_id) {
-      case kFitToPageButtonId:
-        UserMetricsRecordAction("PDF.FitToPageButton");
-        SetZoom(ZOOM_FIT_TO_PAGE, 0);
-        ZoomChanged(zoom_);
-        break;
-      case kFitToWidthButtonId:
-        UserMetricsRecordAction("PDF.FitToWidthButton");
-        SetZoom(ZOOM_FIT_TO_WIDTH, 0);
-        ZoomChanged(zoom_);
-        break;
-      case kZoomOutButtonId:
-      case kZoomInButtonId:
-        UserMetricsRecordAction(control_id == kZoomOutButtonId ?
-            "PDF.ZoomOutButton" : "PDF.ZoomInButton");
-        SetZoom(ZOOM_SCALE, CalculateZoom(control_id));
-        ZoomChanged(zoom_);
-        break;
-      case kSaveButtonId:
-        UserMetricsRecordAction("PDF.SaveButton");
-        SaveAs();
-        break;
-      case kPrintButtonId:
-        UserMetricsRecordAction("PDF.PrintButton");
-        Print();
-        break;
-    }
-  }
-  if (control_id == kThumbnailsId &&
-      event_id == ThumbnailControl::EVENT_ID_THUMBNAIL_SELECTED) {
-    int page = *static_cast<int*>(data);
-    pp::Rect page_rc(engine_->GetPageRect(page));
-    ScrollToY(static_cast<int>(page_rc.y() * zoom_ * device_scale_));
-  }
-}
-
-void Instance::Invalidate(uint32 control_id, const pp::Rect& rc) {
-  paint_manager_.InvalidateRect(rc);
-}
-
-uint32 Instance::ScheduleTimer(uint32 control_id, uint32 timeout_ms) {
-  current_timer_id_++;
-  pp::CompletionCallback callback =
-      timer_factory_.NewCallback(&Instance::OnControlTimerFired,
-                                 control_id,
-                                 current_timer_id_);
-  pp::Module::Get()->core()->CallOnMainThread(timeout_ms, callback);
-  return current_timer_id_;
-}
-
-void Instance::SetEventCapture(uint32 control_id, bool set_capture) {
-  // TODO(gene): set event capture here.
-}
-
-void Instance::SetCursor(uint32 control_id, PP_CursorType_Dev cursor_type) {
-  UpdateCursor(cursor_type);
-}
-
-pp::Instance* Instance::GetInstance() {
-  return this;
-}
-
-void Instance::GetDocumentPassword(
-    pp::CompletionCallbackWithOutput<pp::Var> callback) {
-  std::string message(GetLocalizedString(PP_RESOURCESTRING_PDFGETPASSWORD));
-  pp::Var result = pp::PDF::ModalPromptForPassword(this, message);
-  *callback.output() = result.pp_var();
-  callback.Run(PP_OK);
-}
-
-void Instance::Alert(const std::string& message) {
-  GetWindowObject().Call("alert", message);
-}
-
-bool Instance::Confirm(const std::string& message) {
-  pp::Var result = GetWindowObject().Call("confirm", message);
-  return result.is_bool() ? result.AsBool() : false;
-}
-
-std::string Instance::Prompt(const std::string& question,
-                             const std::string& default_answer) {
-  pp::Var result = GetWindowObject().Call("prompt", question, default_answer);
-  return result.is_string() ? result.AsString() : std::string();
-}
-
-std::string Instance::GetURL() {
-  return url_;
-}
-
-void Instance::Email(const std::string& to,
-                     const std::string& cc,
-                     const std::string& bcc,
-                     const std::string& subject,
-                     const std::string& body) {
-  std::string javascript =
-      "var href = 'mailto:" + net::EscapeUrlEncodedData(to, false) +
-      "?cc=" + net::EscapeUrlEncodedData(cc, false) +
-      "&bcc=" + net::EscapeUrlEncodedData(bcc, false) +
-      "&subject=" + net::EscapeUrlEncodedData(subject, false) +
-      "&body=" + net::EscapeUrlEncodedData(body, false) +
-      "';var temp = window.open(href, '_blank', " +
-      "'width=1,height=1');if(temp) temp.close();";
-  ExecuteScript(javascript);
-}
-
-void Instance::Print() {
-  if (!printing_enabled_ ||
-      (!engine_->HasPermission(PDFEngine::PERMISSION_PRINT_LOW_QUALITY) &&
-       !engine_->HasPermission(PDFEngine::PERMISSION_PRINT_HIGH_QUALITY))) {
-    return;
-  }
-
-  pp::CompletionCallback callback =
-      callback_factory_.NewCallback(&Instance::OnPrint);
-  pp::Module::Get()->core()->CallOnMainThread(0, callback);
-}
-
-void Instance::OnPrint(int32_t) {
-  pp::PDF::Print(this);
-}
-
-void Instance::SaveAs() {
-  pp::PDF::SaveAs(this);
-}
-
-void Instance::SubmitForm(const std::string& url,
-                          const void* data,
-                          int length) {
-  pp::URLRequestInfo request(this);
-  request.SetURL(url);
-  request.SetMethod("POST");
-  request.AppendDataToBody(reinterpret_cast<const char*>(data), length);
-
-  pp::CompletionCallback callback =
-      form_factory_.NewCallback(&Instance::FormDidOpen);
-  form_loader_ = CreateURLLoaderInternal();
-  int rv = form_loader_.Open(request, callback);
-  if (rv != PP_OK_COMPLETIONPENDING)
-    callback.Run(rv);
-}
-
-void Instance::FormDidOpen(int32_t result) {
-  // TODO: inform the user of success/failure.
-  if (result != PP_OK) {
-    NOTREACHED();
-  }
-}
-
-std::string Instance::ShowFileSelectionDialog() {
-  // Seems like very low priority to implement, since the pdf has no way to get
-  // the file data anyways.  Javascript doesn't let you do this synchronously.
-  NOTREACHED();
-  return std::string();
-}
-
-pp::URLLoader Instance::CreateURLLoader() {
-  if (full_) {
-    if (!did_call_start_loading_) {
-      did_call_start_loading_ = true;
-      pp::PDF::DidStartLoading(this);
-    }
-
-    // Disable save and print until the document is fully loaded, since they
-    // would generate an incomplete document.  Need to do this each time we
-    // call DidStartLoading since that resets the content restrictions.
-    pp::PDF::SetContentRestriction(this, CONTENT_RESTRICTION_SAVE |
-                                   CONTENT_RESTRICTION_PRINT);
-  }
-
-  return CreateURLLoaderInternal();
-}
-
-void Instance::ScheduleCallback(int id, int delay_in_ms) {
-  pp::CompletionCallback callback =
-      timer_factory_.NewCallback(&Instance::OnClientTimerFired);
-  pp::Module::Get()->core()->CallOnMainThread(delay_in_ms, callback, id);
-}
-
-void Instance::SearchString(const base::char16* string,
-                            const base::char16* term,
-                            bool case_sensitive,
-                            std::vector<SearchStringResult>* results) {
-  if (!pp::PDF::IsAvailable()) {
-    NOTREACHED();
-    return;
-  }
-
-  PP_PrivateFindResult* pp_results;
-  int count = 0;
-  pp::PDF::SearchString(
-      this,
-      reinterpret_cast<const unsigned short*>(string),
-      reinterpret_cast<const unsigned short*>(term),
-      case_sensitive,
-      &pp_results,
-      &count);
-
-  results->resize(count);
-  for (int i = 0; i < count; ++i) {
-    (*results)[i].start_index = pp_results[i].start_index;
-    (*results)[i].length = pp_results[i].length;
-  }
-
-  pp::Memory_Dev memory;
-  memory.MemFree(pp_results);
-}
-
-void Instance::DocumentPaintOccurred() {
-  if (painted_first_page_)
-    return;
-
-  painted_first_page_ = true;
-  UpdateToolbarPosition(false);
-  toolbar_->Splash(kToolbarSplashTimeoutMs);
-
-  if (engine_->GetNumberOfPages() > 1)
-    show_page_indicator_ = true;
-  else
-    show_page_indicator_ = false;
-
-  if (v_scrollbar_.get() && show_page_indicator_) {
-    page_indicator_.set_current_page(GetPageNumberToDisplay());
-    page_indicator_.Splash(kToolbarSplashTimeoutMs,
-                           kPageIndicatorInitialFadeTimeoutMs);
-  }
-}
-
-void Instance::DocumentLoadComplete(int page_count) {
-  // Clear focus state for OSK.
-  FormTextFieldFocusChange(false);
-
-  // Update progress control.
-  if (progress_bar_.visible())
-    progress_bar_.Fade(false, kProgressFadeTimeoutMs);
-
-  DCHECK(document_load_state_ == LOAD_STATE_LOADING);
-  document_load_state_ = LOAD_STATE_COMPLETE;
-  UserMetricsRecordAction("PDF.LoadSuccess");
-
-  if (did_call_start_loading_) {
-    pp::PDF::DidStopLoading(this);
-    did_call_start_loading_ = false;
-  }
-
-  if (on_load_callback_.is_string())
-    ExecuteScript(on_load_callback_);
-  // Note: If we are in print preview mode on_load_callback_ might call
-  // ScrollTo{X|Y}() and we don't want to scroll again and override it.
-  // #page=N is not supported in Print Preview.
-  if (!IsPrintPreview()) {
-    int initial_page = GetInitialPage(url_);
-    if (initial_page >= 0)
-      ScrollToPage(initial_page);
-  }
-
-  if (!full_)
-    return;
-  if (!pp::PDF::IsAvailable())
-    return;
-
-  int content_restrictions =
-      CONTENT_RESTRICTION_CUT | CONTENT_RESTRICTION_PASTE;
-  if (!engine_->HasPermission(PDFEngine::PERMISSION_COPY))
-    content_restrictions |= CONTENT_RESTRICTION_COPY;
-
-  if (!engine_->HasPermission(PDFEngine::PERMISSION_PRINT_LOW_QUALITY) &&
-      !engine_->HasPermission(PDFEngine::PERMISSION_PRINT_HIGH_QUALITY)) {
-    printing_enabled_ = false;
-    if (current_tb_info_ == kPDFToolbarButtons) {
-      // Remove Print button.
-      CreateToolbar(kPDFNoPrintToolbarButtons,
-                    arraysize(kPDFNoPrintToolbarButtons));
-      UpdateToolbarPosition(false);
-      Invalidate(pp::Rect(plugin_size_));
-    }
-  }
-
-  pp::PDF::SetContentRestriction(this, content_restrictions);
-
-  pp::PDF::HistogramPDFPageCount(this, page_count);
-}
-
-void Instance::RotateClockwise() {
-  engine_->RotateClockwise();
-}
-
-void Instance::RotateCounterclockwise() {
-  engine_->RotateCounterclockwise();
-}
-
-bool Instance::IsMouseOnScrollbar(const pp::InputEvent& event) {
-  pp::MouseInputEvent mouse_event(event);
-  if (mouse_event.is_null())
-    return false;
-
-  pp::Point pt = mouse_event.GetPosition();
-  pp::Rect temp;
-  if ((v_scrollbar_.get() && v_scrollbar_->GetLocation(&temp) &&
-       temp.Contains(pt)) ||
-      (h_scrollbar_.get() && h_scrollbar_->GetLocation(&temp) &&
-       temp.Contains(pt))) {
-    return true;
-  }
-  return false;
-}
-
-void Instance::PreviewDocumentLoadComplete() {
-  if (preview_document_load_state_ != LOAD_STATE_LOADING ||
-      preview_pages_info_.empty()) {
-    return;
-  }
-
-  preview_document_load_state_ = LOAD_STATE_COMPLETE;
-
-  int dest_page_index = preview_pages_info_.front().second;
-  int src_page_index =
-      ExtractPrintPreviewPageIndex(preview_pages_info_.front().first);
-  if (src_page_index > 0 &&  dest_page_index > -1 && preview_engine_.get())
-    engine_->AppendPage(preview_engine_.get(), dest_page_index);
-
-  preview_pages_info_.pop();
-  // |print_preview_page_count_| is not updated yet. Do not load any
-  // other preview pages till we get this information.
-  if (print_preview_page_count_ == 0)
-    return;
-
-  if (preview_pages_info_.size())
-    LoadAvailablePreviewPage();
-}
-
-void Instance::DocumentLoadFailed() {
-  DCHECK(document_load_state_ == LOAD_STATE_LOADING);
-  UserMetricsRecordAction("PDF.LoadFailure");
-
-  // Hide progress control.
-  progress_bar_.Fade(false, kProgressFadeTimeoutMs);
-
-  if (did_call_start_loading_) {
-    pp::PDF::DidStopLoading(this);
-    did_call_start_loading_ = false;
-  }
-
-  document_load_state_ = LOAD_STATE_FAILED;
-  paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
-}
-
-void Instance::PreviewDocumentLoadFailed() {
-  UserMetricsRecordAction("PDF.PreviewDocumentLoadFailure");
-  if (preview_document_load_state_ != LOAD_STATE_LOADING ||
-      preview_pages_info_.empty()) {
-    return;
-  }
-
-  preview_document_load_state_ = LOAD_STATE_FAILED;
-  preview_pages_info_.pop();
-
-  if (preview_pages_info_.size())
-    LoadAvailablePreviewPage();
-}
-
-pp::Instance* Instance::GetPluginInstance() {
-  return GetInstance();
-}
-
-void Instance::DocumentHasUnsupportedFeature(const std::string& feature) {
-  std::string metric("PDF_Unsupported_");
-  metric += feature;
-  if (!unsupported_features_reported_.count(metric)) {
-    unsupported_features_reported_.insert(metric);
-    UserMetricsRecordAction(metric);
-  }
-
-  // Since we use an info bar, only do this for full frame plugins..
-  if (!full_)
-    return;
-
-  if (told_browser_about_unsupported_feature_)
-    return;
-  told_browser_about_unsupported_feature_ = true;
-
-  pp::PDF::HasUnsupportedFeature(this);
-}
-
-void Instance::DocumentLoadProgress(uint32 available, uint32 doc_size) {
-  double progress = 0.0;
-  if (doc_size == 0) {
-    // Document size is unknown. Use heuristics.
-    // We'll make progress logarithmic from 0 to 100M.
-    static const double kFactor = log(100000000.0) / 100.0;
-    if (available > 0) {
-      progress = log(static_cast<double>(available)) / kFactor;
-      if (progress > 100.0)
-        progress = 100.0;
-    }
-  } else {
-    progress = 100.0 * static_cast<double>(available) / doc_size;
-  }
-  progress_bar_.SetProgress(progress);
-}
-
-void Instance::FormTextFieldFocusChange(bool in_focus) {
-  if (!text_input_.get())
-    return;
-  if (in_focus)
-    text_input_->SetTextInputType(PP_TEXTINPUT_TYPE_DEV_TEXT);
-  else
-    text_input_->SetTextInputType(PP_TEXTINPUT_TYPE_DEV_NONE);
-}
-
-// Called by PDFScriptableObject.
-bool Instance::HasScriptableMethod(const pp::Var& method, pp::Var* exception) {
-  std::string method_str = method.AsString();
-  return (method_str == kJSAccessibility ||
-          method_str == kJSDocumentLoadComplete ||
-          method_str == kJSGetHeight ||
-          method_str == kJSGetHorizontalScrollbarThickness ||
-          method_str == kJSGetPageLocationNormalized ||
-          method_str == kJSGetSelectedText ||
-          method_str == kJSGetVerticalScrollbarThickness ||
-          method_str == kJSGetWidth ||
-          method_str == kJSGetZoomLevel ||
-          method_str == kJSGoToPage ||
-          method_str == kJSGrayscale ||
-          method_str == kJSLoadPreviewPage ||
-          method_str == kJSOnLoad ||
-          method_str == kJSOnPluginSizeChanged ||
-          method_str == kJSOnScroll ||
-          method_str == kJSPageXOffset ||
-          method_str == kJSPageYOffset ||
-          method_str == kJSPrintPreviewPageCount ||
-          method_str == kJSReload ||
-          method_str == kJSRemovePrintButton ||
-          method_str == kJSResetPrintPreviewUrl ||
-          method_str == kJSSendKeyEvent ||
-          method_str == kJSSetPageNumbers ||
-          method_str == kJSSetPageXOffset ||
-          method_str == kJSSetPageYOffset ||
-          method_str == kJSSetZoomLevel ||
-          method_str == kJSZoomFitToHeight ||
-          method_str == kJSZoomFitToWidth ||
-          method_str == kJSZoomIn ||
-          method_str == kJSZoomOut);
-}
-
-pp::Var Instance::CallScriptableMethod(const pp::Var& method,
-                                       const std::vector<pp::Var>& args,
-                                       pp::Var* exception) {
-  std::string method_str = method.AsString();
-  if (method_str == kJSGrayscale) {
-    if (args.size() == 1 && args[0].is_bool()) {
-      engine_->SetGrayscale(args[0].AsBool());
-      // Redraw
-      paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
-#ifdef ENABLE_THUMBNAILS
-      if (thumbnails_.visible())
-        thumbnails_.Show(true, true);
-#endif
-      return pp::Var(true);
-    }
-    return pp::Var(false);
-  }
-  if (method_str == kJSOnLoad) {
-    if (args.size() == 1 && args[0].is_string()) {
-      on_load_callback_ = args[0];
-      return pp::Var(true);
-    }
-    return pp::Var(false);
-  }
-  if (method_str == kJSOnScroll) {
-    if (args.size() == 1 && args[0].is_string()) {
-      on_scroll_callback_ = args[0];
-      return pp::Var(true);
-    }
-    return pp::Var(false);
-  }
-  if (method_str == kJSOnPluginSizeChanged) {
-    if (args.size() == 1 && args[0].is_string()) {
-      on_plugin_size_changed_callback_ = args[0];
-      return pp::Var(true);
-    }
-    return pp::Var(false);
-  }
-  if (method_str == kJSReload) {
-    document_load_state_ = LOAD_STATE_LOADING;
-    if (!full_)
-      LoadUrl(url_);
-    preview_engine_.reset();
-    print_preview_page_count_ = 0;
-    engine_.reset(PDFEngine::Create(this));
-    engine_->New(url_.c_str());
-#ifdef ENABLE_THUMBNAILS
-    thumbnails_.ResetEngine(engine_.get());
-#endif
-    return pp::Var();
-  }
-  if (method_str == kJSResetPrintPreviewUrl) {
-    if (args.size() == 1 && args[0].is_string()) {
-      url_ = args[0].AsString();
-      preview_pages_info_ = std::queue<PreviewPageInfo>();
-      preview_document_load_state_ = LOAD_STATE_COMPLETE;
-    }
-    return pp::Var();
-  }
-  if (method_str == kJSZoomFitToHeight) {
-    SetZoom(ZOOM_FIT_TO_PAGE, 0);
-    return pp::Var();
-  }
-  if (method_str == kJSZoomFitToWidth) {
-    SetZoom(ZOOM_FIT_TO_WIDTH, 0);
-    return pp::Var();
-  }
-  if (method_str == kJSZoomIn) {
-    SetZoom(ZOOM_SCALE, CalculateZoom(kZoomInButtonId));
-    return pp::Var();
-  }
-  if (method_str == kJSZoomOut) {
-    SetZoom(ZOOM_SCALE, CalculateZoom(kZoomOutButtonId));
-    return pp::Var();
-  }
-  if (method_str == kJSSetZoomLevel) {
-    if (args.size() == 1 && args[0].is_number())
-      SetZoom(ZOOM_SCALE, args[0].AsDouble());
-    return pp::Var();
-  }
-  if (method_str == kJSGetZoomLevel) {
-    return pp::Var(zoom_);
-  }
-  if (method_str == kJSGetHeight) {
-    return pp::Var(plugin_size_.height());
-  }
-  if (method_str == kJSGetWidth) {
-    return pp::Var(plugin_size_.width());
-  }
-  if (method_str == kJSGetHorizontalScrollbarThickness) {
-    return pp::Var(
-          h_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
-  }
-  if (method_str == kJSGetVerticalScrollbarThickness) {
-    return pp::Var(
-          v_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
-  }
-  if (method_str == kJSGetSelectedText) {
-    std::string selected_text = engine_->GetSelectedText();
-    // Always return unix newlines to JS.
-    base::ReplaceChars(selected_text, "\r", std::string(), &selected_text);
-    return selected_text;
-  }
-  if (method_str == kJSDocumentLoadComplete) {
-    return pp::Var((document_load_state_ != LOAD_STATE_LOADING));
-  }
-  if (method_str == kJSPageYOffset) {
-    return pp::Var(static_cast<int32_t>(
-        v_scrollbar_.get() ? v_scrollbar_->GetValue() : 0));
-  }
-  if (method_str == kJSSetPageYOffset) {
-    if (args.size() == 1 && args[0].is_number() && v_scrollbar_.get())
-      ScrollToY(GetScaled(args[0].AsInt()));
-    return pp::Var();
-  }
-  if (method_str == kJSPageXOffset) {
-    return pp::Var(static_cast<int32_t>(
-        h_scrollbar_.get() ? h_scrollbar_->GetValue() : 0));
-  }
-  if (method_str == kJSSetPageXOffset) {
-    if (args.size() == 1 && args[0].is_number() && h_scrollbar_.get())
-      ScrollToX(GetScaled(args[0].AsInt()));
-    return pp::Var();
-  }
-  if (method_str == kJSRemovePrintButton) {
-    CreateToolbar(kPrintPreviewToolbarButtons,
-                  arraysize(kPrintPreviewToolbarButtons));
-    UpdateToolbarPosition(false);
-    Invalidate(pp::Rect(plugin_size_));
-    return pp::Var();
-  }
-  if (method_str == kJSGoToPage) {
-    if (args.size() == 1 && args[0].is_string()) {
-      ScrollToPage(atoi(args[0].AsString().c_str()));
-    }
-    return pp::Var();
-  }
-  if (method_str == kJSAccessibility) {
-    if (args.size() == 0) {
-      base::DictionaryValue node;
-      node.SetInteger(kAccessibleNumberOfPages, engine_->GetNumberOfPages());
-      node.SetBoolean(kAccessibleLoaded,
-                      document_load_state_ != LOAD_STATE_LOADING);
-      bool has_permissions =
-          engine_->HasPermission(PDFEngine::PERMISSION_COPY) ||
-          engine_->HasPermission(PDFEngine::PERMISSION_COPY_ACCESSIBLE);
-      node.SetBoolean(kAccessibleCopyable, has_permissions);
-      std::string json;
-      base::JSONWriter::Write(&node, &json);
-      return pp::Var(json);
-    } else if (args[0].is_number()) {
-      return pp::Var(engine_->GetPageAsJSON(args[0].AsInt()));
-    }
-  }
-  if (method_str == kJSPrintPreviewPageCount) {
-    if (args.size() == 1 && args[0].is_number())
-      SetPrintPreviewMode(args[0].AsInt());
-    return pp::Var();
-  }
-  if (method_str == kJSLoadPreviewPage) {
-    if (args.size() == 2 && args[0].is_string() && args[1].is_number())
-      ProcessPreviewPageInfo(args[0].AsString(), args[1].AsInt());
-    return pp::Var();
-  }
-  if (method_str == kJSGetPageLocationNormalized) {
-    const size_t kMaxLength = 30;
-    char location_info[kMaxLength];
-    int page_idx = engine_->GetMostVisiblePage();
-    if (page_idx < 0)
-      return pp::Var(std::string());
-    pp::Rect rect = engine_->GetPageContentsRect(page_idx);
-    int v_scrollbar_reserved_thickness =
-        v_scrollbar_.get() ? GetScaled(GetScrollbarReservedThickness()) : 0;
-
-    rect.set_x(rect.x() + ((plugin_size_.width() -
-        v_scrollbar_reserved_thickness - available_area_.width()) / 2));
-    base::snprintf(location_info,
-                   kMaxLength,
-                   "%0.4f;%0.4f;%0.4f;%0.4f;",
-                   rect.x() / static_cast<float>(plugin_size_.width()),
-                   rect.y() / static_cast<float>(plugin_size_.height()),
-                   rect.width() / static_cast<float>(plugin_size_.width()),
-                   rect.height()/ static_cast<float>(plugin_size_.height()));
-    return pp::Var(std::string(location_info));
-  }
-  if (method_str == kJSSetPageNumbers) {
-    if (args.size() != 1 || !args[0].is_string())
-      return pp::Var();
-    const int num_pages_signed = engine_->GetNumberOfPages();
-    if (num_pages_signed <= 0)
-      return pp::Var();
-    scoped_ptr<base::ListValue> page_ranges(static_cast<base::ListValue*>(
-        base::JSONReader::Read(args[0].AsString(), false)));
-    const size_t num_pages = static_cast<size_t>(num_pages_signed);
-    if (!page_ranges.get() || page_ranges->GetSize() != num_pages)
-      return pp::Var();
-
-    std::vector<int> print_preview_page_numbers;
-    for (size_t index = 0; index < num_pages; ++index) {
-      int page_number = 0;  // |page_number| is 1-based.
-      if (!page_ranges->GetInteger(index, &page_number) || page_number < 1)
-        return pp::Var();
-      print_preview_page_numbers.push_back(page_number);
-    }
-    print_preview_page_numbers_ = print_preview_page_numbers;
-    page_indicator_.set_current_page(GetPageNumberToDisplay());
-    return pp::Var();
-  }
-  // This is here to work around https://bugs.webkit.org/show_bug.cgi?id=16735.
-  // In JS, creating a synthetic keyboard event and dispatching it always
-  // result in a keycode of 0.
-  if (method_str == kJSSendKeyEvent) {
-    if (args.size() == 1 && args[0].is_number()) {
-      pp::KeyboardInputEvent event(
-          this,                        // instance
-          PP_INPUTEVENT_TYPE_KEYDOWN,  // HandleInputEvent only care about this.
-          0,                           // timestamp, not used for kbd events.
-          0,                           // no modifiers.
-          args[0].AsInt(),             // keycode.
-          pp::Var());                  // no char text needed.
-      HandleInputEvent(event);
-    }
-  }
-  return pp::Var();
-}
-
-void Instance::OnGeometryChanged(double old_zoom, float old_device_scale) {
-  bool force_no_horizontal_scrollbar = false;
-  int scrollbar_thickness = GetScrollbarThickness();
-
-  if (old_device_scale != device_scale_) {
-    // Change in device scale forces us to recreate resources
-    ConfigureNumberImageGenerator();
-
-    CreateToolbar(current_tb_info_, current_tb_info_size_);
-    // Load autoscroll anchor image.
-    autoscroll_anchor_ =
-        CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAN_SCROLL_ICON);
-
-    ConfigurePageIndicator();
-    ConfigureProgressBar();
-
-    pp::Point scroll_position = engine_->GetScrollPosition();
-    ScalePoint(device_scale_ / old_device_scale, &scroll_position);
-    engine_->SetScrollPosition(scroll_position);
-  }
-
-  UpdateZoomScale();
-  if (zoom_ != old_zoom || device_scale_ != old_device_scale)
-    engine_->ZoomUpdated(zoom_ * device_scale_);
-  if (zoom_ != old_zoom)
-    ZoomChanged(zoom_);
-
-  available_area_ = pp::Rect(plugin_size_);
-  if (GetDocumentPixelHeight() > plugin_size_.height()) {
-    CreateVerticalScrollbar();
-  } else {
-    DestroyVerticalScrollbar();
-  }
-
-  int v_scrollbar_reserved_thickness =
-      v_scrollbar_.get() ? GetScaled(GetScrollbarReservedThickness()) : 0;
-
-  if (!force_no_horizontal_scrollbar &&
-      GetDocumentPixelWidth() >
-      (plugin_size_.width() - v_scrollbar_reserved_thickness)) {
-    CreateHorizontalScrollbar();
-
-    // Adding the horizontal scrollbar now might cause us to need vertical
-    // scrollbars.
-    if (GetDocumentPixelHeight() >
-        plugin_size_.height() - GetScaled(GetScrollbarReservedThickness())) {
-      CreateVerticalScrollbar();
-    }
-
-  } else {
-    DestroyHorizontalScrollbar();
-  }
-
-#ifdef ENABLE_THUMBNAILS
-  int thumbnails_pos = 0, thumbnails_total = 0;
-#endif
-  if (v_scrollbar_.get()) {
-    v_scrollbar_->SetScale(device_scale_);
-    available_area_.set_width(
-      std::max(0, plugin_size_.width() - v_scrollbar_reserved_thickness));
-
-#ifdef ENABLE_THUMBNAILS
-    int height = plugin_size_.height();
-#endif
-    int height_dip = plugin_dip_size_.height();
-
-#if defined(OS_MACOSX)
-    // Before Lion, Mac always had the resize at the bottom. After that, it
-    // never did.
-    if ((base::mac::IsOSSnowLeopard() && full_) ||
-        (base::mac::IsOSLionOrLater() && h_scrollbar_.get())) {
-#else
-    if (h_scrollbar_.get()) {
-#endif  // defined(OS_MACOSX)
-#ifdef ENABLE_THUMBNAILS
-      height -= GetScaled(GetScrollbarThickness());
-#endif
-      height_dip -= GetScrollbarThickness();
-    }
-#ifdef ENABLE_THUMBNAILS
-    int32 doc_height = GetDocumentPixelHeight();
-#endif
-    int32 doc_height_dip =
-        static_cast<int32>(GetDocumentPixelHeight() / device_scale_);
-#if defined(OS_MACOSX)
-    // On the Mac we always allow room for the resize button (whose width is
-    // the same as that of the scrollbar) in full mode. However, if there is no
-    // no horizontal scrollbar, the end of the scrollbar will scroll past the
-    // end of the document. This is because the scrollbar assumes that its own
-    // height (in the case of a vscroll bar) is the same as the height of the
-    // viewport. Since the viewport is actually larger, we compensate by
-    // adjusting the document height. Similar logic applies below for the
-    // horizontal scrollbar.
-    // For example, if the document size is 1000, and the viewport size is 200,
-    // then the scrollbar position at the end will be 800. In this case the
-    // viewport is actally 215 (assuming 15 as the scrollbar width) but the
-    // scrollbar thinks it is 200. We want the scrollbar position at the end to
-    // be 785. Making the document size 985 achieves this.
-    if (full_ && !h_scrollbar_.get()) {
-#ifdef ENABLE_THUMBNAILS
-      doc_height -= GetScaled(GetScrollbarThickness());
-#endif
-      doc_height_dip -= GetScrollbarThickness();
-    }
-#endif  // defined(OS_MACOSX)
-
-    int32 position;
-    position = v_scrollbar_->GetValue();
-    position = static_cast<int>(position * zoom_ / old_zoom);
-    valid_v_range_ = doc_height_dip - height_dip;
-    if (position > valid_v_range_)
-      position = valid_v_range_;
-
-    v_scrollbar_->SetValue(position);
-
-    PP_Rect loc;
-    loc.point.x = static_cast<int>(available_area_.right() / device_scale_);
-    if (IsOverlayScrollbar())
-      loc.point.x -= scrollbar_thickness;
-    loc.point.y = 0;
-    loc.size.width = scrollbar_thickness;
-    loc.size.height = height_dip;
-    v_scrollbar_->SetLocation(loc);
-    v_scrollbar_->SetDocumentSize(doc_height_dip);
-
-#ifdef ENABLE_THUMBNAILS
-    thumbnails_pos = position;
-    thumbnails_total = doc_height - height;
-#endif
-  }
-
-  if (h_scrollbar_.get()) {
-    h_scrollbar_->SetScale(device_scale_);
-    available_area_.set_height(
-        std::max(0, plugin_size_.height() -
-                    GetScaled(GetScrollbarReservedThickness())));
-
-    int width_dip = plugin_dip_size_.width();
-
-    // See note above.
-#if defined(OS_MACOSX)
-    if ((base::mac::IsOSSnowLeopard() && full_) ||
-        (base::mac::IsOSLionOrLater() && v_scrollbar_.get())) {
-#else
-    if (v_scrollbar_.get()) {
-#endif
-      width_dip -= GetScrollbarThickness();
-    }
-    int32 doc_width_dip =
-        static_cast<int32>(GetDocumentPixelWidth() / device_scale_);
-#if defined(OS_MACOSX)
-    // See comment in the above if (v_scrollbar_.get()) block.
-    if (full_ && !v_scrollbar_.get())
-      doc_width_dip -= GetScrollbarThickness();
-#endif  // defined(OS_MACOSX)
-
-    int32 position;
-    position = h_scrollbar_->GetValue();
-    position = static_cast<int>(position * zoom_ / old_zoom);
-    position = std::min(position, doc_width_dip - width_dip);
-
-    h_scrollbar_->SetValue(position);
-
-    PP_Rect loc;
-    loc.point.x = 0;
-    loc.point.y = static_cast<int>(available_area_.bottom() / device_scale_);
-    if (IsOverlayScrollbar())
-      loc.point.y -= scrollbar_thickness;
-    loc.size.width = width_dip;
-    loc.size.height = scrollbar_thickness;
-    h_scrollbar_->SetLocation(loc);
-    h_scrollbar_->SetDocumentSize(doc_width_dip);
-  }
-
-  int doc_width = GetDocumentPixelWidth();
-  if (doc_width < available_area_.width()) {
-    available_area_.Offset((available_area_.width() - doc_width) / 2, 0);
-    available_area_.set_width(doc_width);
-  }
-  int doc_height = GetDocumentPixelHeight();
-  if (doc_height < available_area_.height()) {
-    available_area_.set_height(doc_height);
-  }
-
-  // We'll invalidate the entire plugin anyways.
-  UpdateToolbarPosition(false);
-  UpdateProgressBarPosition(false);
-  UpdatePageIndicatorPosition(false);
-
-#ifdef ENABLE_THUMBNAILS
-  // Update thumbnail control position.
-  thumbnails_.SetPosition(thumbnails_pos, thumbnails_total, false);
-  pp::Rect thumbnails_rc(plugin_size_.width() - GetScaled(kThumbnailsWidth), 0,
-    GetScaled(kThumbnailsWidth), plugin_size_.height());
-  if (v_scrollbar_.get())
-    thumbnails_rc.Offset(-v_scrollbar_reserved_thickness, 0);
-  if (h_scrollbar_.get())
-    thumbnails_rc.Inset(0, 0, 0, v_scrollbar_reserved_thickness);
-  thumbnails_.SetRect(thumbnails_rc, false);
-#endif
-
-  CalculateBackgroundParts();
-  engine_->PageOffsetUpdated(available_area_.point());
-  engine_->PluginSizeUpdated(available_area_.size());
-
-  if (!document_size_.GetArea())
-    return;
-  paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
-
-  // Run the plugin size change callback asynchronously. This function can be
-  // invoked by a layout change which should not re-enter into JS synchronously.
-  pp::CompletionCallback callback =
-      callback_factory_.NewCallback(&Instance::RunCallback,
-                                    on_plugin_size_changed_callback_);
-  pp::Module::Get()->core()->CallOnMainThread(0, callback);
-}
-
-void Instance::RunCallback(int32_t, pp::Var callback) {
-  if (callback.is_string())
-    ExecuteScript(callback);
-}
-
-void Instance::CreateHorizontalScrollbar() {
-  if (h_scrollbar_.get())
-    return;
-
-  h_scrollbar_.reset(new pp::Scrollbar_Dev(this, false));
-}
-
-void Instance::CreateVerticalScrollbar() {
-  if (v_scrollbar_.get())
-    return;
-
-  v_scrollbar_.reset(new pp::Scrollbar_Dev(this, true));
-}
-
-void Instance::DestroyHorizontalScrollbar() {
-  if (!h_scrollbar_.get())
-    return;
-  if (h_scrollbar_->GetValue())
-    engine_->ScrolledToXPosition(0);
-  h_scrollbar_.reset();
-}
-
-void Instance::DestroyVerticalScrollbar() {
-  if (!v_scrollbar_.get())
-    return;
-  if (v_scrollbar_->GetValue())
-    engine_->ScrolledToYPosition(0);
-  v_scrollbar_.reset();
-  page_indicator_.Show(false, true);
-}
-
-int Instance::GetScrollbarThickness() {
-  if (scrollbar_thickness_ == -1) {
-    pp::Scrollbar_Dev temp_scrollbar(this, false);
-    scrollbar_thickness_ = temp_scrollbar.GetThickness();
-    scrollbar_reserved_thickness_ =
-      temp_scrollbar.IsOverlay() ? 0 : scrollbar_thickness_;
-  }
-
-  return scrollbar_thickness_;
-}
-
-int Instance::GetScrollbarReservedThickness() {
-  GetScrollbarThickness();
-  return scrollbar_reserved_thickness_;
-}
-
-bool Instance::IsOverlayScrollbar() {
-  return GetScrollbarReservedThickness() == 0;
-}
-
-void Instance::CreateToolbar(const ToolbarButtonInfo* tb_info, size_t size) {
-  toolbar_.reset(new FadingControls());
-
-  DCHECK(tb_info);
-  DCHECK(size >= 0);
-
-  // Remember the current toolbar information in case we need to recreate the
-  // images later.
-  current_tb_info_ = tb_info;
-  current_tb_info_size_ = size;
-
-  int max_height = 0;
-  pp::Point origin(kToolbarFadingOffsetLeft, kToolbarFadingOffsetTop);
-  ScalePoint(device_scale_, &origin);
-
-  std::list<Button*> buttons;
-  for (size_t i = 0; i < size; i++) {
-    Button* btn = new Button;
-    pp::ImageData normal_face =
-        CreateResourceImage(tb_info[i].normal);
-    btn->CreateButton(tb_info[i].id,
-                      origin,
-                      true,
-                      toolbar_.get(),
-                      tb_info[i].style,
-                      normal_face,
-                      CreateResourceImage(tb_info[i].highlighted),
-                      CreateResourceImage(tb_info[i].pressed));
-    buttons.push_back(btn);
-
-    origin += pp::Point(normal_face.size().width(), 0);
-    max_height = std::max(max_height, normal_face.size().height());
-  }
-
-  pp::Rect rc_toolbar(0, 0,
-      origin.x() + GetToolbarRightOffset(),
-      origin.y() + max_height + GetToolbarBottomOffset());
-  toolbar_->CreateFadingControls(
-      kToolbarId, rc_toolbar, false, this, kTransparentAlpha);
-
-  std::list<Button*>::iterator iter;
-  for (iter = buttons.begin(); iter != buttons.end(); ++iter) {
-    toolbar_->AddControl(*iter);
-  }
-}
-
-int Instance::GetToolbarRightOffset() {
-  int scrollbar_thickness = GetScrollbarThickness();
-  return GetScaled(kToolbarFadingOffsetRight) + 2 * scrollbar_thickness;
-}
-
-int Instance::GetToolbarBottomOffset() {
-  int scrollbar_thickness = GetScrollbarThickness();
-  return GetScaled(kToolbarFadingOffsetBottom) + scrollbar_thickness;
-}
-
-std::vector<pp::ImageData> Instance::GetThumbnailResources() {
-  std::vector<pp::ImageData> num_images(10);
-  num_images[0] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_0);
-  num_images[1] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_1);
-  num_images[2] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_2);
-  num_images[3] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_3);
-  num_images[4] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_4);
-  num_images[5] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_5);
-  num_images[6] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_6);
-  num_images[7] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_7);
-  num_images[8] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_8);
-  num_images[9] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_9);
-  return num_images;
-}
-
-std::vector<pp::ImageData> Instance::GetProgressBarResources(
-    pp::ImageData* background) {
-  std::vector<pp::ImageData> result(9);
-  result[0] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_0);
-  result[1] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_1);
-  result[2] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_2);
-  result[3] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_3);
-  result[4] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_4);
-  result[5] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_5);
-  result[6] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_6);
-  result[7] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_7);
-  result[8] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_8);
-  *background = CreateResourceImage(
-      PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_BACKGROUND);
-  return result;
-}
-
-void Instance::CreatePageIndicator(bool always_visible) {
-  page_indicator_.CreatePageIndicator(kPageIndicatorId, false, this,
-      number_image_generator(), always_visible);
-  ConfigurePageIndicator();
-}
-
-void Instance::ConfigurePageIndicator() {
-  pp::ImageData background =
-      CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAGE_INDICATOR_BACKGROUND);
-  page_indicator_.Configure(pp::Point(), background);
-}
-
-void Instance::CreateProgressBar() {
-  pp::ImageData background;
-  std::vector<pp::ImageData> images = GetProgressBarResources(&background);
-  std::string text = GetLocalizedString(PP_RESOURCESTRING_PDFPROGRESSLOADING);
-  progress_bar_.CreateProgressControl(kProgressBarId, false, this, 0.0,
-      device_scale_, images, background, text);
-}
-
-void Instance::ConfigureProgressBar() {
-  pp::ImageData background;
-  std::vector<pp::ImageData> images = GetProgressBarResources(&background);
-  progress_bar_.Reconfigure(background, images, device_scale_);
-}
-
-void Instance::CreateThumbnails() {
-  thumbnails_.CreateThumbnailControl(
-      kThumbnailsId, pp::Rect(), false, this, engine_.get(),
-      number_image_generator());
-}
-
-void Instance::LoadUrl(const std::string& url) {
-  LoadUrlInternal(url, &embed_loader_, &Instance::DidOpen);
-}
-
-void Instance::LoadPreviewUrl(const std::string& url) {
-  LoadUrlInternal(url, &embed_preview_loader_, &Instance::DidOpenPreview);
-}
-
-void Instance::LoadUrlInternal(const std::string& url, pp::URLLoader* loader,
-                               void (Instance::* method)(int32_t)) {
-  pp::URLRequestInfo request(this);
-  request.SetURL(url);
-  request.SetMethod("GET");
-
-  *loader = CreateURLLoaderInternal();
-  pp::CompletionCallback callback = loader_factory_.NewCallback(method);
-  int rv = loader->Open(request, callback);
-  if (rv != PP_OK_COMPLETIONPENDING)
-    callback.Run(rv);
-}
-
-pp::URLLoader Instance::CreateURLLoaderInternal() {
-  pp::URLLoader loader(this);
-
-  const PPB_URLLoaderTrusted* trusted_interface =
-      reinterpret_cast<const PPB_URLLoaderTrusted*>(
-          pp::Module::Get()->GetBrowserInterface(
-              PPB_URLLOADERTRUSTED_INTERFACE));
-  if (trusted_interface)
-    trusted_interface->GrantUniversalAccess(loader.pp_resource());
-  return loader;
-}
-
-int Instance::GetInitialPage(const std::string& url) {
-  size_t found_idx = url.find('#');
-  if (found_idx == std::string::npos)
-    return -1;
-
-  const std::string& ref = url.substr(found_idx + 1);
-  std::vector<std::string> fragments;
-  Tokenize(ref, kDelimiters, &fragments);
-
-  // Page number to return, zero-based.
-  int page = -1;
-
-  // Handle the case of http://foo.com/bar#NAMEDDEST. This is not explicitly
-  // mentioned except by example in the Adobe "PDF Open Parameters" document.
-  if ((fragments.size() == 1) && (fragments[0].find('=') == std::string::npos))
-    return engine_->GetNamedDestinationPage(fragments[0]);
-
-  for (size_t i = 0; i < fragments.size(); ++i) {
-    std::vector<std::string> key_value;
-    base::SplitString(fragments[i], '=', &key_value);
-    if (key_value.size() != 2)
-      continue;
-    const std::string& key = key_value[0];
-    const std::string& value = key_value[1];
-
-    if (base::strcasecmp(kPage, key.c_str()) == 0) {
-      // |page_value| is 1-based.
-      int page_value = -1;
-      if (base::StringToInt(value, &page_value) && page_value > 0)
-        page = page_value - 1;
-      continue;
-    }
-    if (base::strcasecmp(kNamedDest, key.c_str()) == 0) {
-      // |page_value| is 0-based.
-      int page_value = engine_->GetNamedDestinationPage(value);
-      if (page_value >= 0)
-        page = page_value;
-      continue;
-    }
-  }
-  return page;
-}
-
-void Instance::UpdateToolbarPosition(bool invalidate) {
-  pp::Rect ctrl_rc = toolbar_->GetControlsRect();
-  int min_toolbar_width = ctrl_rc.width() + GetToolbarRightOffset() +
-      GetScaled(kToolbarFadingOffsetLeft);
-  int min_toolbar_height = ctrl_rc.width() + GetToolbarBottomOffset() +
-      GetScaled(kToolbarFadingOffsetBottom);
-
-  // Update toolbar position
-  if (plugin_size_.width() < min_toolbar_width ||
-      plugin_size_.height() < min_toolbar_height) {
-    // Disable toolbar if it does not fit on the screen.
-    toolbar_->Show(false, invalidate);
-  } else {
-    pp::Point offset(
-        plugin_size_.width() - GetToolbarRightOffset() - ctrl_rc.right(),
-        plugin_size_.height() - GetToolbarBottomOffset() - ctrl_rc.bottom());
-    toolbar_->MoveBy(offset, invalidate);
-
-    int toolbar_width = std::max(plugin_size_.width() / 2, min_toolbar_width);
-    toolbar_->ExpandLeft(toolbar_width - toolbar_->rect().width());
-    toolbar_->Show(painted_first_page_, invalidate);
-  }
-}
-
-void Instance::UpdateProgressBarPosition(bool invalidate) {
-  // TODO(gene): verify we don't overlap with toolbar.
-  int scrollbar_thickness = GetScrollbarThickness();
-  pp::Point progress_origin(
-      scrollbar_thickness + GetScaled(kProgressOffsetLeft),
-      plugin_size_.height() - progress_bar_.rect().height() -
-          scrollbar_thickness - GetScaled(kProgressOffsetBottom));
-  progress_bar_.MoveTo(progress_origin, invalidate);
-}
-
-void Instance::UpdatePageIndicatorPosition(bool invalidate) {
-  int32 doc_height = static_cast<int>(document_size_.height() * zoom_);
-  pp::Point origin(
-      plugin_size_.width() - page_indicator_.rect().width() -
-          GetScaled(GetScrollbarReservedThickness()),
-      page_indicator_.GetYPosition(engine_->GetVerticalScrollbarYPosition(),
-                                   doc_height, plugin_size_.height()));
-  page_indicator_.MoveTo(origin, invalidate);
-}
-
-void Instance::SetZoom(ZoomMode zoom_mode, double scale) {
-  double old_zoom = zoom_;
-
-  zoom_mode_ = zoom_mode;
-  if (zoom_mode_ == ZOOM_SCALE)
-    zoom_ = scale;
-  UpdateZoomScale();
-
-  engine_->ZoomUpdated(zoom_ * device_scale_);
-  OnGeometryChanged(old_zoom, device_scale_);
-
-  // If fit-to-height, snap to the beginning of the most visible page.
-  if (zoom_mode_ == ZOOM_FIT_TO_PAGE) {
-    ScrollToPage(engine_->GetMostVisiblePage());
-  }
-
-  // Update sticky buttons to the current zoom style.
-  Button* ftp_btn = static_cast<Button*>(
-      toolbar_->GetControl(kFitToPageButtonId));
-  Button* ftw_btn = static_cast<Button*>(
-      toolbar_->GetControl(kFitToWidthButtonId));
-  switch (zoom_mode_) {
-    case ZOOM_FIT_TO_PAGE:
-      ftp_btn->SetPressedState(true);
-      ftw_btn->SetPressedState(false);
-      break;
-    case ZOOM_FIT_TO_WIDTH:
-      ftw_btn->SetPressedState(true);
-      ftp_btn->SetPressedState(false);
-      break;
-    default:
-      ftw_btn->SetPressedState(false);
-      ftp_btn->SetPressedState(false);
-  }
-}
-
-void Instance::UpdateZoomScale() {
-  switch (zoom_mode_) {
-    case ZOOM_SCALE:
-      break;  // Keep current scale.
-    case ZOOM_FIT_TO_PAGE: {
-      int page_num = engine_->GetFirstVisiblePage();
-      if (page_num == -1)
-        break;
-      pp::Rect rc = engine_->GetPageRect(page_num);
-      if (!rc.height())
-        break;
-      // Calculate fit to width zoom level.
-      double ftw_zoom = static_cast<double>(plugin_dip_size_.width() -
-          GetScrollbarReservedThickness()) / document_size_.width();
-      // Calculate fit to height zoom level. If document will not fit
-      // horizontally, adjust zoom level to allow space for horizontal
-      // scrollbar.
-      double fth_zoom =
-          static_cast<double>(plugin_dip_size_.height()) / rc.height();
-      if (fth_zoom * document_size_.width() >
-          plugin_dip_size_.width() - GetScrollbarReservedThickness())
-        fth_zoom = static_cast<double>(plugin_dip_size_.height()
-            - GetScrollbarReservedThickness()) / rc.height();
-      zoom_ = std::min(ftw_zoom, fth_zoom);
-    } break;
-    case ZOOM_FIT_TO_WIDTH:
-    case ZOOM_AUTO:
-      if (!document_size_.width())
-        break;
-      zoom_ = static_cast<double>(plugin_dip_size_.width() -
-          GetScrollbarReservedThickness()) / document_size_.width();
-      if (zoom_mode_ == ZOOM_AUTO && zoom_ > 1.0)
-        zoom_ = 1.0;
-      break;
-  }
-  zoom_ = ClipToRange(zoom_, kMinZoom, kMaxZoom);
-}
-
-double Instance::CalculateZoom(uint32 control_id) const {
-  if (control_id == kZoomInButtonId) {
-    for (size_t i = 0; i < ui_zoom::kPresetZoomFactorsSize; ++i) {
-      double current_zoom = ui_zoom::kPresetZoomFactors[i];
-      if (current_zoom - content::kEpsilon > zoom_)
-        return current_zoom;
-    }
-  } else {
-    for (size_t i = ui_zoom::kPresetZoomFactorsSize; i > 0; --i) {
-      double current_zoom = ui_zoom::kPresetZoomFactors[i - 1];
-      if (current_zoom + content::kEpsilon < zoom_)
-        return current_zoom;
-    }
-  }
-  return zoom_;
-}
-
-pp::ImageData Instance::CreateResourceImage(PP_ResourceImage image_id) {
-  pp::ImageData resource_data;
-  if (hidpi_enabled_) {
-    resource_data =
-        pp::PDF::GetResourceImageForScale(this, image_id, device_scale_);
-  }
-
-  return resource_data.data() ? resource_data
-                              : pp::PDF::GetResourceImage(this, image_id);
-}
-
-std::string Instance::GetLocalizedString(PP_ResourceString id) {
-  pp::Var rv(pp::PDF::GetLocalizedString(this, id));
-  if (!rv.is_string())
-    return std::string();
-
-  return rv.AsString();
-}
-
-void Instance::DrawText(const pp::Point& top_center, PP_ResourceString id) {
-  std::string str(GetLocalizedString(id));
-
-  pp::FontDescription_Dev description;
-  description.set_family(PP_FONTFAMILY_SANSSERIF);
-  description.set_size(kMessageTextSize * device_scale_);
-  pp::Font_Dev font(this, description);
-  int length = font.MeasureSimpleText(str);
-  pp::Point point(top_center);
-  point.set_x(point.x() - length / 2);
-  DCHECK(!image_data_.is_null());
-  font.DrawSimpleText(&image_data_, str, point, kMessageTextColor);
-}
-
-void Instance::SetPrintPreviewMode(int page_count) {
-  if (!IsPrintPreview() || page_count <= 0) {
-    print_preview_page_count_ = 0;
-    return;
-  }
-
-  print_preview_page_count_ = page_count;
-  ScrollToPage(0);
-  engine_->AppendBlankPages(print_preview_page_count_);
-  if (preview_pages_info_.size() > 0)
-    LoadAvailablePreviewPage();
-}
-
-bool Instance::IsPrintPreview() {
-  return IsPrintPreviewUrl(url_);
-}
-
-uint32 Instance::GetBackgroundColor() {
-  return kBackgroundColor;
-}
-
-int Instance::GetPageNumberToDisplay() {
-  int page = engine_->GetMostVisiblePage();
-  if (IsPrintPreview() && !print_preview_page_numbers_.empty()) {
-    page = ClipToRange<int>(page, 0, print_preview_page_numbers_.size() - 1);
-    return print_preview_page_numbers_[page];
-  }
-  return page + 1;
-}
-
-void Instance::ProcessPreviewPageInfo(const std::string& url,
-                                      int dst_page_index) {
-  if (!IsPrintPreview() || print_preview_page_count_ < 0)
-    return;
-
-  int src_page_index = ExtractPrintPreviewPageIndex(url);
-  if (src_page_index < 1)
-    return;
-
-  preview_pages_info_.push(std::make_pair(url, dst_page_index));
-  LoadAvailablePreviewPage();
-}
-
-void Instance::LoadAvailablePreviewPage() {
-  if (preview_pages_info_.size() <= 0)
-    return;
-
-  std::string url = preview_pages_info_.front().first;
-  int dst_page_index = preview_pages_info_.front().second;
-  int src_page_index = ExtractPrintPreviewPageIndex(url);
-  if (src_page_index < 1 ||
-      dst_page_index >= print_preview_page_count_ ||
-      preview_document_load_state_ == LOAD_STATE_LOADING) {
-    return;
-  }
-
-  preview_document_load_state_ = LOAD_STATE_LOADING;
-  LoadPreviewUrl(url);
-}
-
-void Instance::EnableAutoscroll(const pp::Point& origin) {
-  if (is_autoscroll_)
-    return;
-
-  pp::Size client_size = plugin_size_;
-  if (v_scrollbar_.get())
-    client_size.Enlarge(-GetScrollbarThickness(), 0);
-  if (h_scrollbar_.get())
-    client_size.Enlarge(0, -GetScrollbarThickness());
-
-  // Do not allow autoscroll if client area is too small.
-  if (autoscroll_anchor_.size().width() > client_size.width() ||
-      autoscroll_anchor_.size().height() > client_size.height())
-    return;
-
-  autoscroll_rect_ = pp::Rect(
-      pp::Point(origin.x() - autoscroll_anchor_.size().width() / 2,
-                origin.y() - autoscroll_anchor_.size().height() / 2),
-      autoscroll_anchor_.size());
-
-  // Make sure autoscroll anchor is in the client area.
-  if (autoscroll_rect_.right() > client_size.width()) {
-    autoscroll_rect_.set_x(
-        client_size.width() - autoscroll_anchor_.size().width());
-  }
-  if (autoscroll_rect_.bottom() > client_size.height()) {
-    autoscroll_rect_.set_y(
-        client_size.height() - autoscroll_anchor_.size().height());
-  }
-
-  if (autoscroll_rect_.x() < 0)
-    autoscroll_rect_.set_x(0);
-  if (autoscroll_rect_.y() < 0)
-    autoscroll_rect_.set_y(0);
-
-  is_autoscroll_ = true;
-  Invalidate(kAutoScrollId, autoscroll_rect_);
-
-  ScheduleTimer(kAutoScrollId, kAutoScrollTimeoutMs);
-}
-
-void Instance::DisableAutoscroll() {
-  if (is_autoscroll_) {
-    is_autoscroll_ = false;
-    Invalidate(kAutoScrollId, autoscroll_rect_);
-  }
-}
-
-PP_CursorType_Dev Instance::CalculateAutoscroll(const pp::Point& mouse_pos) {
-  // Scroll only if mouse pointer is outside of the anchor area.
-  if (autoscroll_rect_.Contains(mouse_pos)) {
-    autoscroll_x_ = 0;
-    autoscroll_y_ = 0;
-    return PP_CURSORTYPE_MIDDLEPANNING;
-  }
-
-  // Relative position to the center of anchor area.
-  pp::Point rel_pos = mouse_pos - autoscroll_rect_.CenterPoint();
-
-  // Calculate angle from the X axis. Angle is in range from -pi to pi.
-  double angle = atan2(static_cast<double>(rel_pos.y()),
-                       static_cast<double>(rel_pos.x()));
-
-  autoscroll_x_ = rel_pos.x() * kAutoScrollFactor;
-  autoscroll_y_ = rel_pos.y() * kAutoScrollFactor;
-
-  // Angle is from -pi to pi. Screen Y is increasing toward bottom,
-  // so negative angle represent north direction.
-  if (angle < - (M_PI * 7.0 / 8.0)) {
-    // going west
-    return PP_CURSORTYPE_WESTPANNING;
-  } else if (angle < - (M_PI * 5.0 / 8.0)) {
-    // going north-west
-    return PP_CURSORTYPE_NORTHWESTPANNING;
-  } else if (angle < - (M_PI * 3.0 / 8.0)) {
-    // going north.
-    return PP_CURSORTYPE_NORTHPANNING;
-  } else if (angle < - (M_PI * 1.0 / 8.0)) {
-    // going north-east
-    return PP_CURSORTYPE_NORTHEASTPANNING;
-  } else if (angle < M_PI * 1.0 / 8.0) {
-    // going east.
-    return PP_CURSORTYPE_EASTPANNING;
-  } else if (angle < M_PI * 3.0 / 8.0) {
-    // going south-east
-    return PP_CURSORTYPE_SOUTHEASTPANNING;
-  } else if (angle < M_PI * 5.0 / 8.0) {
-    // going south.
-    return PP_CURSORTYPE_SOUTHPANNING;
-  } else if (angle < M_PI * 7.0 / 8.0) {
-    // going south-west
-    return PP_CURSORTYPE_SOUTHWESTPANNING;
-  }
-
-  // went around the circle, going west again
-  return PP_CURSORTYPE_WESTPANNING;
-}
-
-void Instance::ConfigureNumberImageGenerator() {
-  std::vector<pp::ImageData> num_images = GetThumbnailResources();
-  pp::ImageData number_background = CreateResourceImage(
-      PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_NUM_BACKGROUND);
-  number_image_generator_->Configure(number_background,
-                                     num_images,
-                                     device_scale_);
-}
-
-NumberImageGenerator* Instance::number_image_generator() {
-  if (!number_image_generator_.get()) {
-    number_image_generator_.reset(new NumberImageGenerator(this));
-    ConfigureNumberImageGenerator();
-  }
-  return number_image_generator_.get();
-}
-
-int Instance::GetScaled(int x) const {
-  return static_cast<int>(x * device_scale_);
-}
-
-void Instance::UserMetricsRecordAction(const std::string& action) {
-  pp::PDF::UserMetricsRecordAction(this, pp::Var(action));
-}
-
-PDFScriptableObject::PDFScriptableObject(Instance* instance)
-    : instance_(instance) {
-}
-
-PDFScriptableObject::~PDFScriptableObject() {
-}
-
-bool PDFScriptableObject::HasMethod(const pp::Var& name, pp::Var* exception) {
-  return instance_->HasScriptableMethod(name, exception);
-}
-
-pp::Var PDFScriptableObject::Call(const pp::Var& method,
-                                  const std::vector<pp::Var>& args,
-                                  pp::Var* exception) {
-  return instance_->CallScriptableMethod(method, args, exception);
-}
-
-}  // namespace chrome_pdf