Clear RenderThread of any Chrome specific code, and move a bunch of stuff out of RenderView.

chrome/renderer/chrome_render_observer.cc

Index: chrome/renderer/chrome_render_observer.cc
===================================================================
--- chrome/renderer/chrome_render_observer.cc	(revision 81801)
+++ chrome/renderer/chrome_render_observer.cc	(working copy)
@@ -1,346 +0,0 @@
-// Copyright (c) 2011 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 "chrome/renderer/chrome_render_observer.h"
-
-#include "base/command_line.h"
-#include "base/message_loop.h"
-#include "base/metrics/histogram.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/common/render_messages.h"
-#include "chrome/common/thumbnail_score.h"
-#include "chrome/renderer/safe_browsing/phishing_classifier_delegate.h"
-#include "chrome/renderer/translate_helper.h"
-#include "content/renderer/content_renderer_client.h"
-#include "content/renderer/render_view.h"
-#include "skia/ext/bitmap_platform_device.h"
-#include "skia/ext/image_operations.h"
-#include "skia/ext/platform_canvas.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebDataSource.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebRect.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebSize.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
-#include "ui/gfx/color_utils.h"
-#include "ui/gfx/skbitmap_operations.h"
-#include "webkit/glue/webkit_glue.h"
-
-using WebKit::WebDataSource;
-using WebKit::WebFrame;
-using WebKit::WebRect;
-using WebKit::WebSize;
-using WebKit::WebView;
-
-// Delay in milliseconds that we'll wait before capturing the page contents
-// and thumbnail.
-static const int kDelayForCaptureMs = 500;
-
-// Typically, we capture the page data once the page is loaded.
-// Sometimes, the page never finishes to load, preventing the page capture
-// To workaround this problem, we always perform a capture after the following
-// delay.
-static const int kDelayForForcedCaptureMs = 6000;
-
-// define to write the time necessary for thumbnail/DOM text retrieval,
-// respectively, into the system debug log
-// #define TIME_TEXT_RETRIEVAL
-
-// maximum number of characters in the document to index, any text beyond this
-// point will be clipped
-static const size_t kMaxIndexChars = 65535;
-
-// Size of the thumbnails that we'll generate
-static const int kThumbnailWidth = 212;
-static const int kThumbnailHeight = 132;
-
-static bool PaintViewIntoCanvas(WebView* view,
-                                skia::PlatformCanvas& canvas) {
-  view->layout();
-  const WebSize& size = view->size();
-
-  if (!canvas.initialize(size.width, size.height, true))
-    return false;
-
-  view->paint(webkit_glue::ToWebCanvas(&canvas),
-              WebRect(0, 0, size.width, size.height));
-  // TODO: Add a way to snapshot the whole page, not just the currently
-  // visible part.
-
-  return true;
-}
-
-// Calculates how "boring" a thumbnail is. The boring score is the
-// 0,1 ranged percentage of pixels that are the most common
-// luma. Higher boring scores indicate that a higher percentage of a
-// bitmap are all the same brightness.
-static double CalculateBoringScore(SkBitmap* bitmap) {
-  int histogram[256] = {0};
-  color_utils::BuildLumaHistogram(bitmap, histogram);
-
-  int color_count = *std::max_element(histogram, histogram + 256);
-  int pixel_count = bitmap->width() * bitmap->height();
-  return static_cast<double>(color_count) / pixel_count;
-}
-
-ChromeRenderObserver::ChromeRenderObserver(
-    RenderView* render_view,
-    TranslateHelper* translate_helper,
-    safe_browsing::PhishingClassifierDelegate* phishing_classifier)
-    : RenderViewObserver(render_view),
-      translate_helper_(translate_helper),
-      phishing_classifier_(phishing_classifier),
-      last_indexed_page_id_(-1),
-      ALLOW_THIS_IN_INITIALIZER_LIST(page_info_method_factory_(this)) {
-}
-
-ChromeRenderObserver::~ChromeRenderObserver() {
-}
-
-bool ChromeRenderObserver::OnMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(ChromeRenderObserver, message)
-    IPC_MESSAGE_HANDLER(ViewMsg_CaptureSnapshot, OnCaptureSnapshot)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void ChromeRenderObserver::OnCaptureSnapshot() {
-  SkBitmap snapshot;
-  bool error = false;
-
-  WebFrame* main_frame = render_view()->webview()->mainFrame();
-  if (!main_frame)
-    error = true;
-
-  if (!error && !CaptureSnapshot(render_view()->webview(), &snapshot))
-    error = true;
-
-  DCHECK(error == snapshot.empty()) <<
-      "Snapshot should be empty on error, non-empty otherwise.";
-
-  // Send the snapshot to the browser process.
-  Send(new ViewHostMsg_Snapshot(routing_id(), snapshot));
-}
-
-void ChromeRenderObserver::DidStopLoading() {
-  MessageLoop::current()->PostDelayedTask(
-      FROM_HERE,
-      page_info_method_factory_.NewRunnableMethod(
-          &ChromeRenderObserver::CapturePageInfo, render_view()->page_id(),
-          false),
-      render_view()->content_state_immediately() ? 0 : kDelayForCaptureMs);
-}
-
-void ChromeRenderObserver::DidCommitProvisionalLoad(WebFrame* frame,
-                                                    bool is_new_navigation) {
-  if (!is_new_navigation)
-    return;
-
-  MessageLoop::current()->PostDelayedTask(
-      FROM_HERE,
-      page_info_method_factory_.NewRunnableMethod(
-          &ChromeRenderObserver::CapturePageInfo, render_view()->page_id(),
-          true),
-      kDelayForForcedCaptureMs);
-}
-
-void ChromeRenderObserver::CapturePageInfo(int load_id,
-                                           bool preliminary_capture) {
-  if (load_id != render_view()->page_id())
-    return;  // This capture call is no longer relevant due to navigation.
-
-  if (load_id == last_indexed_page_id_)
-    return;  // we already indexed this page
-
-  if (!render_view()->webview())
-    return;
-
-  WebFrame* main_frame = render_view()->webview()->mainFrame();
-  if (!main_frame)
-    return;
-
-  // Don't index/capture pages that are in view source mode.
-  if (main_frame->isViewSourceModeEnabled())
-    return;
-
-  // Don't index/capture pages that failed to load.  This only checks the top
-  // level frame so the thumbnail may contain a frame that failed to load.
-  WebDataSource* ds = main_frame->dataSource();
-  if (ds && ds->hasUnreachableURL())
-    return;
-
-  if (!preliminary_capture)
-    last_indexed_page_id_ = load_id;
-
-  // Get the URL for this page.
-  GURL url(main_frame->url());
-  if (url.is_empty())
-    return;
-
-  // Retrieve the frame's full text.
-  string16 contents;
-  CaptureText(main_frame, &contents);
-  if (contents.size()) {
-    if (translate_helper_)
-      translate_helper_->PageCaptured(contents);
-    // Send the text to the browser for indexing (the browser might decide not
-    // to index, if the URL is HTTPS for instance) and language discovery.
-    Send(new ViewHostMsg_PageContents(routing_id(), url, load_id, contents));
-  }
-
-  // Generate the thumbnail here if the in-browser thumbnailing isn't
-  // enabled. TODO(satorux): Remove this and related code once
-  // crbug.com/65936 is complete.
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableInBrowserThumbnailing)) {
-    CaptureThumbnail();
-  }
-
-  // Will swap out the string.
-  if (phishing_classifier_)
-    phishing_classifier_->PageCaptured(&contents, preliminary_capture);
-}
-
-void ChromeRenderObserver::CaptureText(WebFrame* frame, string16* contents) {
-  contents->clear();
-  if (!frame)
-    return;
-
-#ifdef TIME_TEXT_RETRIEVAL
-  double begin = time_util::GetHighResolutionTimeNow();
-#endif
-
-  // get the contents of the frame
-  *contents = frame->contentAsText(kMaxIndexChars);
-
-#ifdef TIME_TEXT_RETRIEVAL
-  double end = time_util::GetHighResolutionTimeNow();
-  char buf[128];
-  sprintf_s(buf, "%d chars retrieved for indexing in %gms\n",
-            contents.size(), (end - begin)*1000);
-  OutputDebugStringA(buf);
-#endif
-
-  // When the contents are clipped to the maximum, we don't want to have a
-  // partial word indexed at the end that might have been clipped. Therefore,
-  // terminate the string at the last space to ensure no words are clipped.
-  if (contents->size() == kMaxIndexChars) {
-    size_t last_space_index = contents->find_last_of(kWhitespaceUTF16);
-    if (last_space_index == std::wstring::npos)
-      return;  // don't index if we got a huge block of text with no spaces
-    contents->resize(last_space_index);
-  }
-}
-
-void ChromeRenderObserver::CaptureThumbnail() {
-  WebFrame* main_frame = render_view()->webview()->mainFrame();
-  if (!main_frame)
-    return;
-
-  // get the URL for this page
-  GURL url(main_frame->url());
-  if (url.is_empty())
-    return;
-
-  if (render_view()->size().IsEmpty())
-    return;  // Don't create an empty thumbnail!
-
-  ThumbnailScore score;
-  SkBitmap thumbnail;
-  if (!CaptureFrameThumbnail(render_view()->webview(), kThumbnailWidth,
-                             kThumbnailHeight, &thumbnail, &score))
-    return;
-
-  // send the thumbnail message to the browser process
-  Send(new ViewHostMsg_Thumbnail(routing_id(), url, score, thumbnail));
-}
-
-bool ChromeRenderObserver::CaptureFrameThumbnail(WebView* view,
-                                                 int w,
-                                                 int h,
-                                                 SkBitmap* thumbnail,
-                                                 ThumbnailScore* score) {
-  base::TimeTicks beginning_time = base::TimeTicks::Now();
-
-  skia::PlatformCanvas canvas;
-
-  // Paint |view| into |canvas|.
-  if (!PaintViewIntoCanvas(view, canvas))
-    return false;
-
-  skia::BitmapPlatformDevice& device =
-      static_cast<skia::BitmapPlatformDevice&>(canvas.getTopPlatformDevice());
-
-  const SkBitmap& src_bmp = device.accessBitmap(false);
-
-  SkRect dest_rect = { 0, 0, SkIntToScalar(w), SkIntToScalar(h) };
-  float dest_aspect = dest_rect.width() / dest_rect.height();
-
-  // Get the src rect so that we can preserve the aspect ratio while filling
-  // the destination.
-  SkIRect src_rect;
-  if (src_bmp.width() < dest_rect.width() ||
-      src_bmp.height() < dest_rect.height()) {
-    // Source image is smaller: we clip the part of source image within the
-    // dest rect, and then stretch it to fill the dest rect. We don't respect
-    // the aspect ratio in this case.
-    src_rect.set(0, 0, static_cast<S16CPU>(dest_rect.width()),
-                 static_cast<S16CPU>(dest_rect.height()));
-    score->good_clipping = false;
-  } else {
-    float src_aspect = static_cast<float>(src_bmp.width()) / src_bmp.height();
-    if (src_aspect > dest_aspect) {
-      // Wider than tall, clip horizontally: we center the smaller thumbnail in
-      // the wider screen.
-      S16CPU new_width = static_cast<S16CPU>(src_bmp.height() * dest_aspect);
-      S16CPU x_offset = (src_bmp.width() - new_width) / 2;
-      src_rect.set(x_offset, 0, new_width + x_offset, src_bmp.height());
-      score->good_clipping = false;
-    } else {
-      src_rect.set(0, 0, src_bmp.width(),
-                   static_cast<S16CPU>(src_bmp.width() / dest_aspect));
-      score->good_clipping = true;
-    }
-  }
-
-  score->at_top = (view->mainFrame()->scrollOffset().height == 0);
-
-  SkBitmap subset;
-  device.accessBitmap(false).extractSubset(&subset, src_rect);
-
-  // First do a fast downsample by powers of two to get close to the final size.
-  SkBitmap downsampled_subset =
-      SkBitmapOperations::DownsampleByTwoUntilSize(subset, w, h);
-
-  // Do a high-quality resize from the downscaled size to the final size.
-  *thumbnail = skia::ImageOperations::Resize(
-      downsampled_subset, skia::ImageOperations::RESIZE_LANCZOS3, w, h);
-
-  score->boring_score = CalculateBoringScore(thumbnail);
-
-  HISTOGRAM_TIMES("Renderer4.Thumbnail",
-                  base::TimeTicks::Now() - beginning_time);
-
-  return true;
-}
-
-bool ChromeRenderObserver::CaptureSnapshot(WebView* view, SkBitmap* snapshot) {
-  base::TimeTicks beginning_time = base::TimeTicks::Now();
-
-  skia::PlatformCanvas canvas;
-  if (!PaintViewIntoCanvas(view, canvas))
-    return false;
-
-  skia::BitmapPlatformDevice& device =
-      static_cast<skia::BitmapPlatformDevice&>(canvas.getTopPlatformDevice());
-
-  const SkBitmap& bitmap = device.accessBitmap(false);
-  if (!bitmap.copyTo(snapshot, SkBitmap::kARGB_8888_Config))
-    return false;
-
-  HISTOGRAM_TIMES("Renderer4.Snapshot",
-                  base::TimeTicks::Now() - beginning_time);
-  return true;
-}