Move NPAPI implementation out of webkit/plugins/npapi and into content.

webkit/plugins/npapi/webplugin_delegate_impl_win.cc

Index: webkit/plugins/npapi/webplugin_delegate_impl_win.cc
===================================================================
--- webkit/plugins/npapi/webplugin_delegate_impl_win.cc	(revision 212369)
+++ webkit/plugins/npapi/webplugin_delegate_impl_win.cc	(working copy)
@@ -1,1547 +0,0 @@
-// 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 "webkit/plugins/npapi/webplugin_delegate_impl.h"
-
-#include <map>
-#include <set>
-#include <string>
-#include <vector>
-
-#include "base/bind.h"
-#include "base/compiler_specific.h"
-#include "base/lazy_instance.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_loop.h"
-#include "base/metrics/stats_counters.h"
-#include "base/strings/string_util.h"
-#include "base/strings/stringprintf.h"
-#include "base/synchronization/lock.h"
-#include "base/version.h"
-#include "base/win/iat_patch_function.h"
-#include "base/win/registry.h"
-#include "base/win/windows_version.h"
-#include "skia/ext/platform_canvas.h"
-#include "third_party/WebKit/public/web/WebInputEvent.h"
-#include "ui/base/win/dpi.h"
-#include "ui/base/win/hwnd_util.h"
-#include "webkit/common/cursors/webcursor.h"
-#include "webkit/plugins/npapi/plugin_constants_win.h"
-#include "webkit/plugins/npapi/plugin_instance.h"
-#include "webkit/plugins/npapi/plugin_lib.h"
-#include "webkit/plugins/npapi/plugin_stream_url.h"
-#include "webkit/plugins/npapi/plugin_utils.h"
-#include "webkit/plugins/npapi/webplugin.h"
-#include "webkit/plugins/npapi/webplugin_ime_win.h"
-#include "webkit/plugins/plugin_constants.h"
-
-using WebKit::WebKeyboardEvent;
-using WebKit::WebInputEvent;
-using WebKit::WebMouseEvent;
-
-namespace webkit {
-namespace npapi {
-
-namespace {
-
-const wchar_t kWebPluginDelegateProperty[] = L"WebPluginDelegateProperty";
-const wchar_t kPluginNameAtomProperty[] = L"PluginNameAtom";
-const wchar_t kPluginVersionAtomProperty[] = L"PluginVersionAtom";
-const wchar_t kDummyActivationWindowName[] = L"DummyWindowForActivation";
-const wchar_t kPluginFlashThrottle[] = L"FlashThrottle";
-
-// The fastest we are willing to process WM_USER+1 events for Flash.
-// Flash can easily exceed the limits of our CPU if we don't throttle it.
-// The throttle has been chosen by testing various delays and compromising
-// on acceptable Flash performance and reasonable CPU consumption.
-//
-// I'd like to make the throttle delay variable, based on the amount of
-// time currently required to paint Flash plugins.  There isn't a good
-// way to count the time spent in aggregate plugin painting, however, so
-// this seems to work well enough.
-const int kFlashWMUSERMessageThrottleDelayMs = 5;
-
-// Flash displays popups in response to user clicks by posting a WM_USER
-// message to the plugin window. The handler for this message displays
-// the popup. To ensure that the popups allowed state is sent correctly
-// to the renderer we reset the popups allowed state in a timer.
-const int kWindowedPluginPopupTimerMs = 50;
-
-// The current instance of the plugin which entered the modal loop.
-WebPluginDelegateImpl* g_current_plugin_instance = NULL;
-
-typedef std::deque<MSG> ThrottleQueue;
-base::LazyInstance<ThrottleQueue> g_throttle_queue = LAZY_INSTANCE_INITIALIZER;
-
-base::LazyInstance<std::map<HWND, WNDPROC> > g_window_handle_proc_map =
-    LAZY_INSTANCE_INITIALIZER;
-
-// Helper object for patching the TrackPopupMenu API.
-base::LazyInstance<base::win::IATPatchFunction> g_iat_patch_track_popup_menu =
-    LAZY_INSTANCE_INITIALIZER;
-
-// Helper object for patching the SetCursor API.
-base::LazyInstance<base::win::IATPatchFunction> g_iat_patch_set_cursor =
-    LAZY_INSTANCE_INITIALIZER;
-
-// Helper object for patching the RegEnumKeyExW API.
-base::LazyInstance<base::win::IATPatchFunction> g_iat_patch_reg_enum_key_ex_w =
-    LAZY_INSTANCE_INITIALIZER;
-
-// Helper object for patching the GetProcAddress API.
-base::LazyInstance<base::win::IATPatchFunction> g_iat_patch_get_proc_address =
-    LAZY_INSTANCE_INITIALIZER;
-
-// http://crbug.com/16114
-// Enforces providing a valid device context in NPWindow, so that NPP_SetWindow
-// is never called with NPNWindoTypeDrawable and NPWindow set to NULL.
-// Doing so allows removing NPP_SetWindow call during painting a windowless
-// plugin, which otherwise could trigger layout change while painting by
-// invoking NPN_Evaluate. Which would cause bad, bad crashes. Bad crashes.
-// TODO(dglazkov): If this approach doesn't produce regressions, move class to
-// webplugin_delegate_impl.h and implement for other platforms.
-class DrawableContextEnforcer {
- public:
-  explicit DrawableContextEnforcer(NPWindow* window)
-      : window_(window),
-        disposable_dc_(window && !window->window) {
-    // If NPWindow is NULL, create a device context with monochrome 1x1 surface
-    // and stuff it to NPWindow.
-    if (disposable_dc_)
-      window_->window = CreateCompatibleDC(NULL);
-  }
-
-  ~DrawableContextEnforcer() {
-    if (!disposable_dc_)
-      return;
-
-    DeleteDC(static_cast<HDC>(window_->window));
-    window_->window = NULL;
-  }
-
- private:
-  NPWindow* window_;
-  bool disposable_dc_;
-};
-
-// These are from ntddk.h
-typedef LONG NTSTATUS;
-
-#ifndef STATUS_SUCCESS
-#define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
-#endif
-
-#ifndef STATUS_BUFFER_TOO_SMALL
-#define STATUS_BUFFER_TOO_SMALL ((NTSTATUS)0xC0000023L)
-#endif
-
-typedef enum _KEY_INFORMATION_CLASS {
-  KeyBasicInformation,
-  KeyNodeInformation,
-  KeyFullInformation,
-  KeyNameInformation,
-  KeyCachedInformation,
-  KeyVirtualizationInformation
-} KEY_INFORMATION_CLASS;
-
-typedef struct _KEY_NAME_INFORMATION {
-  ULONG NameLength;
-  WCHAR Name[1];
-} KEY_NAME_INFORMATION, *PKEY_NAME_INFORMATION;
-
-typedef DWORD (__stdcall *ZwQueryKeyType)(
-    HANDLE  key_handle,
-    int key_information_class,
-    PVOID  key_information,
-    ULONG  length,
-    PULONG  result_length);
-
-// Returns a key's full path.
-std::wstring GetKeyPath(HKEY key) {
-  if (key == NULL)
-    return L"";
-
-  HMODULE dll = GetModuleHandle(L"ntdll.dll");
-  if (dll == NULL)
-    return L"";
-
-  ZwQueryKeyType func = reinterpret_cast<ZwQueryKeyType>(
-      ::GetProcAddress(dll, "ZwQueryKey"));
-  if (func == NULL)
-    return L"";
-
-  DWORD size = 0;
-  DWORD result = 0;
-  result = func(key, KeyNameInformation, 0, 0, &size);
-  if (result != STATUS_BUFFER_TOO_SMALL)
-    return L"";
-
-  scoped_ptr<char[]> buffer(new char[size]);
-  if (buffer.get() == NULL)
-    return L"";
-
-  result = func(key, KeyNameInformation, buffer.get(), size, &size);
-  if (result != STATUS_SUCCESS)
-    return L"";
-
-  KEY_NAME_INFORMATION* info =
-      reinterpret_cast<KEY_NAME_INFORMATION*>(buffer.get());
-  return std::wstring(info->Name, info->NameLength / sizeof(wchar_t));
-}
-
-int GetPluginMajorVersion(const WebPluginInfo& plugin_info) {
-  Version plugin_version;
-  webkit::npapi::CreateVersionFromString(plugin_info.version, &plugin_version);
-
-  int major_version = 0;
-  if (plugin_version.IsValid())
-    major_version = plugin_version.components()[0];
-
-  return major_version;
-}
-
-bool GetPluginPropertyFromWindow(
-    HWND window, const wchar_t* plugin_atom_property,
-    base::string16* plugin_property) {
-  ATOM plugin_atom = reinterpret_cast<ATOM>(
-      GetPropW(window, plugin_atom_property));
-  if (plugin_atom != 0) {
-    WCHAR plugin_property_local[MAX_PATH] = {0};
-    GlobalGetAtomNameW(plugin_atom,
-                       plugin_property_local,
-                       ARRAYSIZE(plugin_property_local));
-    *plugin_property = plugin_property_local;
-    return true;
-  }
-  return false;
-}
-
-}  // namespace
-
-bool WebPluginDelegateImpl::IsPluginDelegateWindow(HWND window) {
-  return ui::GetClassName(window) == base::string16(kNativeWindowClassName);
-}
-
-// static
-bool WebPluginDelegateImpl::GetPluginNameFromWindow(
-    HWND window, base::string16* plugin_name) {
-  return IsPluginDelegateWindow(window) &&
-      GetPluginPropertyFromWindow(
-          window, kPluginNameAtomProperty, plugin_name);
-}
-
-// static
-bool WebPluginDelegateImpl::GetPluginVersionFromWindow(
-    HWND window, base::string16* plugin_version) {
-  return IsPluginDelegateWindow(window) &&
-      GetPluginPropertyFromWindow(
-          window, kPluginVersionAtomProperty, plugin_version);
-}
-
-bool WebPluginDelegateImpl::IsDummyActivationWindow(HWND window) {
-  if (!IsWindow(window))
-    return false;
-
-  wchar_t window_title[MAX_PATH + 1] = {0};
-  if (GetWindowText(window, window_title, arraysize(window_title))) {
-    return (0 == lstrcmpiW(window_title, kDummyActivationWindowName));
-  }
-  return false;
-}
-
-HWND WebPluginDelegateImpl::GetDefaultWindowParent() {
-  return GetDesktopWindow();
-}
-
-LRESULT CALLBACK WebPluginDelegateImpl::HandleEventMessageFilterHook(
-    int code, WPARAM wParam, LPARAM lParam) {
-  if (g_current_plugin_instance) {
-    g_current_plugin_instance->OnModalLoopEntered();
-  } else {
-    NOTREACHED();
-  }
-  return CallNextHookEx(NULL, code, wParam, lParam);
-}
-
-LRESULT CALLBACK WebPluginDelegateImpl::MouseHookProc(
-    int code, WPARAM wParam, LPARAM lParam) {
-  if (code == HC_ACTION) {
-    MOUSEHOOKSTRUCT* hook_struct = reinterpret_cast<MOUSEHOOKSTRUCT*>(lParam);
-    if (hook_struct)
-      HandleCaptureForMessage(hook_struct->hwnd, wParam);
-  }
-
-  return CallNextHookEx(NULL, code, wParam, lParam);
-}
-
-WebPluginDelegateImpl::WebPluginDelegateImpl(
-    PluginInstance* instance)
-    : instance_(instance),
-      quirks_(0),
-      plugin_(NULL),
-      windowless_(false),
-      windowed_handle_(NULL),
-      windowed_did_set_window_(false),
-      plugin_wnd_proc_(NULL),
-      last_message_(0),
-      is_calling_wndproc(false),
-      dummy_window_for_activation_(NULL),
-      dummy_window_parent_(NULL),
-      old_dummy_window_proc_(NULL),
-      handle_event_message_filter_hook_(NULL),
-      handle_event_pump_messages_event_(NULL),
-      user_gesture_message_posted_(false),
-      user_gesture_msg_factory_(this),
-      handle_event_depth_(0),
-      mouse_hook_(NULL),
-      first_set_window_call_(true),
-      plugin_has_focus_(false),
-      has_webkit_focus_(false),
-      containing_view_has_focus_(true),
-      creation_succeeded_(false) {
-  memset(&window_, 0, sizeof(window_));
-
-  const WebPluginInfo& plugin_info = instance_->plugin_lib()->plugin_info();
-  std::wstring filename =
-      StringToLowerASCII(plugin_info.path.BaseName().value());
-
-  if (instance_->mime_type() == kFlashPluginSwfMimeType ||
-      filename == kFlashPlugin) {
-    // Flash only requests windowless plugins if we return a Mozilla user
-    // agent.
-    instance_->set_use_mozilla_user_agent();
-    quirks_ |= PLUGIN_QUIRK_THROTTLE_WM_USER_PLUS_ONE;
-    quirks_ |= PLUGIN_QUIRK_PATCH_SETCURSOR;
-    quirks_ |= PLUGIN_QUIRK_ALWAYS_NOTIFY_SUCCESS;
-    quirks_ |= PLUGIN_QUIRK_HANDLE_MOUSE_CAPTURE;
-    quirks_ |= PLUGIN_QUIRK_EMULATE_IME;
-  } else if (filename == kAcrobatReaderPlugin) {
-    // Check for the version number above or equal 9.
-    int major_version = GetPluginMajorVersion(plugin_info);
-    if (major_version >= 9) {
-      quirks_ |= PLUGIN_QUIRK_DIE_AFTER_UNLOAD;
-      // 9.2 needs this.
-      quirks_ |= PLUGIN_QUIRK_SETWINDOW_TWICE;
-    }
-    quirks_ |= PLUGIN_QUIRK_BLOCK_NONSTANDARD_GETURL_REQUESTS;
-  } else if (plugin_info.name.find(L"Windows Media Player") !=
-             std::wstring::npos) {
-    // Windows Media Player needs two NPP_SetWindow calls.
-    quirks_ |= PLUGIN_QUIRK_SETWINDOW_TWICE;
-
-    // Windowless mode doesn't work in the WMP NPAPI plugin.
-    quirks_ |= PLUGIN_QUIRK_NO_WINDOWLESS;
-
-    // The media player plugin sets its size on the first NPP_SetWindow call
-    // and never updates its size. We should call the underlying NPP_SetWindow
-    // only when we have the correct size.
-    quirks_ |= PLUGIN_QUIRK_IGNORE_FIRST_SETWINDOW_CALL;
-
-    if (filename == kOldWMPPlugin) {
-      // Non-admin users on XP couldn't modify the key to force the new UI.
-      quirks_ |= PLUGIN_QUIRK_PATCH_REGENUMKEYEXW;
-    }
-  } else if (instance_->mime_type() == "audio/x-pn-realaudio-plugin" ||
-             filename == kRealPlayerPlugin) {
-    quirks_ |= PLUGIN_QUIRK_DONT_CALL_WND_PROC_RECURSIVELY;
-  } else if (plugin_info.name.find(L"VLC Multimedia Plugin") !=
-             std::wstring::npos ||
-             plugin_info.name.find(L"VLC Multimedia Plug-in") !=
-             std::wstring::npos) {
-    // VLC hangs on NPP_Destroy if we call NPP_SetWindow with a null window
-    // handle
-    quirks_ |= PLUGIN_QUIRK_DONT_SET_NULL_WINDOW_HANDLE_ON_DESTROY;
-    int major_version = GetPluginMajorVersion(plugin_info);
-    if (major_version == 0) {
-      // VLC 0.8.6d and 0.8.6e crash if multiple instances are created.
-      quirks_ |= PLUGIN_QUIRK_DONT_ALLOW_MULTIPLE_INSTANCES;
-    }
-  } else if (filename == kSilverlightPlugin) {
-    // Explanation for this quirk can be found in
-    // WebPluginDelegateImpl::Initialize.
-    quirks_ |= PLUGIN_QUIRK_PATCH_SETCURSOR;
-  } else if (plugin_info.name.find(L"DivX Web Player") !=
-             std::wstring::npos) {
-    // The divx plugin sets its size on the first NPP_SetWindow call and never
-    // updates its size. We should call the underlying NPP_SetWindow only when
-    // we have the correct size.
-    quirks_ |= PLUGIN_QUIRK_IGNORE_FIRST_SETWINDOW_CALL;
-  }
-}
-
-WebPluginDelegateImpl::~WebPluginDelegateImpl() {
-  if (::IsWindow(dummy_window_for_activation_)) {
-    WNDPROC current_wnd_proc = reinterpret_cast<WNDPROC>(
-        GetWindowLongPtr(dummy_window_for_activation_, GWLP_WNDPROC));
-    if (current_wnd_proc == DummyWindowProc) {
-      SetWindowLongPtr(dummy_window_for_activation_,
-                       GWLP_WNDPROC,
-                       reinterpret_cast<LONG>(old_dummy_window_proc_));
-    }
-    ::DestroyWindow(dummy_window_for_activation_);
-  }
-
-  DestroyInstance();
-
-  if (!windowless_)
-    WindowedDestroyWindow();
-
-  if (handle_event_pump_messages_event_) {
-    CloseHandle(handle_event_pump_messages_event_);
-  }
-}
-
-bool WebPluginDelegateImpl::PlatformInitialize() {
-  plugin_->SetWindow(windowed_handle_);
-
-  if (windowless_) {
-    CreateDummyWindowForActivation();
-    handle_event_pump_messages_event_ = CreateEvent(NULL, TRUE, FALSE, NULL);
-    plugin_->SetWindowlessData(
-        handle_event_pump_messages_event_,
-        reinterpret_cast<gfx::NativeViewId>(dummy_window_for_activation_));
-  }
-
-  // Windowless plugins call the WindowFromPoint API and passes the result of
-  // that to the TrackPopupMenu API call as the owner window. This causes the
-  // API to fail as the API expects the window handle to live on the same
-  // thread as the caller. It works in the other browsers as the plugin lives
-  // on the browser thread. Our workaround is to intercept the TrackPopupMenu
-  // API and replace the window handle with the dummy activation window.
-  if (windowless_ && !g_iat_patch_track_popup_menu.Pointer()->is_patched()) {
-    g_iat_patch_track_popup_menu.Pointer()->Patch(
-        GetPluginPath().value().c_str(), "user32.dll", "TrackPopupMenu",
-        WebPluginDelegateImpl::TrackPopupMenuPatch);
-  }
-
-  // Windowless plugins can set cursors by calling the SetCursor API. This
-  // works because the thread inputs of the browser UI thread and the plugin
-  // thread are attached. We intercept the SetCursor API for windowless
-  // plugins and remember the cursor being set. This is shipped over to the
-  // browser in the HandleEvent call, which ensures that the cursor does not
-  // change when a windowless plugin instance changes the cursor
-  // in a background tab.
-  if (windowless_ && !g_iat_patch_set_cursor.Pointer()->is_patched() &&
-      (quirks_ & PLUGIN_QUIRK_PATCH_SETCURSOR)) {
-    g_iat_patch_set_cursor.Pointer()->Patch(
-        GetPluginPath().value().c_str(), "user32.dll", "SetCursor",
-        WebPluginDelegateImpl::SetCursorPatch);
-  }
-
-  // The windowed flash plugin has a bug which occurs when the plugin enters
-  // fullscreen mode. It basically captures the mouse on WM_LBUTTONDOWN and
-  // does not release capture correctly causing it to stop receiving
-  // subsequent mouse events. This problem is also seen in Safari where there
-  // is code to handle this in the wndproc. However the plugin subclasses the
-  // window again in WM_LBUTTONDOWN before entering full screen. As a result
-  // Safari does not receive the WM_LBUTTONUP message. To workaround this
-  // issue we use a per thread mouse hook. This bug does not occur in Firefox
-  // and opera. Firefox has code similar to Safari. It could well be a bug in
-  // the flash plugin, which only occurs in webkit based browsers.
-  if (quirks_ & PLUGIN_QUIRK_HANDLE_MOUSE_CAPTURE) {
-    mouse_hook_ = SetWindowsHookEx(WH_MOUSE, MouseHookProc, NULL,
-                                    GetCurrentThreadId());
-  }
-
-  // On XP, WMP will use its old UI unless a registry key under HKLM has the
-  // name of the current process.  We do it in the installer for admin users,
-  // for the rest patch this function.
-  if ((quirks_ & PLUGIN_QUIRK_PATCH_REGENUMKEYEXW) &&
-      base::win::GetVersion() == base::win::VERSION_XP &&
-      (base::win::RegKey().Open(HKEY_LOCAL_MACHINE,
-          L"SOFTWARE\\Microsoft\\MediaPlayer\\ShimInclusionList\\chrome.exe",
-          KEY_READ) != ERROR_SUCCESS) &&
-      !g_iat_patch_reg_enum_key_ex_w.Pointer()->is_patched()) {
-    g_iat_patch_reg_enum_key_ex_w.Pointer()->Patch(
-        L"wmpdxm.dll", "advapi32.dll", "RegEnumKeyExW",
-        WebPluginDelegateImpl::RegEnumKeyExWPatch);
-  }
-
-  // Flash retrieves the pointers to IMM32 functions with GetProcAddress() calls
-  // and use them to retrieve IME data. We add a patch to this function so we
-  // can dispatch these IMM32 calls to the WebPluginIMEWin class, which emulates
-  // IMM32 functions for Flash.
-  if (!g_iat_patch_get_proc_address.Pointer()->is_patched() &&
-      (quirks_ & PLUGIN_QUIRK_EMULATE_IME)) {
-    g_iat_patch_get_proc_address.Pointer()->Patch(
-        GetPluginPath().value().c_str(), "kernel32.dll", "GetProcAddress",
-        GetProcAddressPatch);
-  }
-
-  return true;
-}
-
-void WebPluginDelegateImpl::PlatformDestroyInstance() {
-  if (!instance_->plugin_lib())
-    return;
-
-  // Unpatch if this is the last plugin instance.
-  if (instance_->plugin_lib()->instance_count() != 1)
-    return;
-
-  if (g_iat_patch_set_cursor.Pointer()->is_patched())
-    g_iat_patch_set_cursor.Pointer()->Unpatch();
-
-  if (g_iat_patch_track_popup_menu.Pointer()->is_patched())
-    g_iat_patch_track_popup_menu.Pointer()->Unpatch();
-
-  if (g_iat_patch_reg_enum_key_ex_w.Pointer()->is_patched())
-    g_iat_patch_reg_enum_key_ex_w.Pointer()->Unpatch();
-
-  if (mouse_hook_) {
-    UnhookWindowsHookEx(mouse_hook_);
-    mouse_hook_ = NULL;
-  }
-}
-
-void WebPluginDelegateImpl::Paint(WebKit::WebCanvas* canvas,
-                                  const gfx::Rect& rect) {
-  if (windowless_ && skia::SupportsPlatformPaint(canvas)) {
-    skia::ScopedPlatformPaint scoped_platform_paint(canvas);
-    HDC hdc = scoped_platform_paint.GetPlatformSurface();
-    WindowlessPaint(hdc, rect);
-  }
-}
-
-bool WebPluginDelegateImpl::WindowedCreatePlugin() {
-  DCHECK(!windowed_handle_);
-
-  RegisterNativeWindowClass();
-
-  // The window will be sized and shown later.
-  windowed_handle_ = CreateWindowEx(
-      WS_EX_LEFT | WS_EX_LTRREADING | WS_EX_RIGHTSCROLLBAR,
-      kNativeWindowClassName,
-      0,
-      WS_POPUP | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
-      0,
-      0,
-      0,
-      0,
-      GetDefaultWindowParent(),
-      0,
-      GetModuleHandle(NULL),
-      0);
-  if (windowed_handle_ == 0)
-    return false;
-
-    // This is a tricky workaround for Issue 2673 in chromium "Flash: IME not
-    // available". To use IMEs in this window, we have to make Windows attach
-  // IMEs to this window (i.e. load IME DLLs, attach them to this process, and
-  // add their message hooks to this window). Windows attaches IMEs while this
-  // process creates a top-level window. On the other hand, to layout this
-  // window correctly in the given parent window (RenderWidgetHostViewWin or
-  // RenderWidgetHostViewAura), this window should be a child window of the
-  // parent window. To satisfy both of the above conditions, this code once
-  // creates a top-level window and change it to a child window of the parent
-  // window (in the browser process).
-    SetWindowLongPtr(windowed_handle_, GWL_STYLE,
-                     WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS);
-
-  BOOL result = SetProp(windowed_handle_, kWebPluginDelegateProperty, this);
-  DCHECK(result == TRUE) << "SetProp failed, last error = " << GetLastError();
-  // Get the name and version of the plugin, create atoms and set them in a
-  // window property. Use atoms so that other processes can access the name and
-  // version of the plugin that this window is hosting.
-  if (instance_ != NULL) {
-    PluginLib* plugin_lib = instance()->plugin_lib();
-    if (plugin_lib != NULL) {
-      std::wstring plugin_name = plugin_lib->plugin_info().name;
-      if (!plugin_name.empty()) {
-        ATOM plugin_name_atom = GlobalAddAtomW(plugin_name.c_str());
-        DCHECK_NE(0, plugin_name_atom);
-        result = SetProp(windowed_handle_,
-            kPluginNameAtomProperty,
-            reinterpret_cast<HANDLE>(plugin_name_atom));
-        DCHECK(result == TRUE) << "SetProp failed, last error = " <<
-            GetLastError();
-      }
-      base::string16 plugin_version = plugin_lib->plugin_info().version;
-      if (!plugin_version.empty()) {
-        ATOM plugin_version_atom = GlobalAddAtomW(plugin_version.c_str());
-        DCHECK_NE(0, plugin_version_atom);
-        result = SetProp(windowed_handle_,
-            kPluginVersionAtomProperty,
-            reinterpret_cast<HANDLE>(plugin_version_atom));
-        DCHECK(result == TRUE) << "SetProp failed, last error = " <<
-            GetLastError();
-      }
-    }
-  }
-
-  // Calling SetWindowLongPtrA here makes the window proc ASCII, which is
-  // required by at least the Shockwave Director plug-in.
-  SetWindowLongPtrA(
-      windowed_handle_, GWLP_WNDPROC, reinterpret_cast<LONG>(DefWindowProcA));
-
-  return true;
-}
-
-void WebPluginDelegateImpl::WindowedDestroyWindow() {
-  if (windowed_handle_ != NULL) {
-    // Unsubclass the window.
-    WNDPROC current_wnd_proc = reinterpret_cast<WNDPROC>(
-        GetWindowLongPtr(windowed_handle_, GWLP_WNDPROC));
-    if (current_wnd_proc == NativeWndProc) {
-      SetWindowLongPtr(windowed_handle_,
-                       GWLP_WNDPROC,
-                       reinterpret_cast<LONG>(plugin_wnd_proc_));
-    }
-
-    plugin_->WillDestroyWindow(windowed_handle_);
-
-    DestroyWindow(windowed_handle_);
-    windowed_handle_ = 0;
-  }
-}
-
-// Erase all messages in the queue destined for a particular window.
-// When windows are closing, callers should use this function to clear
-// the queue.
-// static
-void WebPluginDelegateImpl::ClearThrottleQueueForWindow(HWND window) {
-  ThrottleQueue* throttle_queue = g_throttle_queue.Pointer();
-
-  ThrottleQueue::iterator it;
-  for (it = throttle_queue->begin(); it != throttle_queue->end(); ) {
-    if (it->hwnd == window) {
-      it = throttle_queue->erase(it);
-    } else {
-      it++;
-    }
-  }
-}
-
-// Delayed callback for processing throttled messages.
-// Throttled messages are aggregated globally across all plugins.
-// static
-void WebPluginDelegateImpl::OnThrottleMessage() {
-  // The current algorithm walks the list and processes the first
-  // message it finds for each plugin.  It is important to service
-  // all active plugins with each pass through the throttle, otherwise
-  // we see video jankiness.  Copy the set to notify before notifying
-  // since we may re-enter OnThrottleMessage from CallWindowProc!
-  ThrottleQueue* throttle_queue = g_throttle_queue.Pointer();
-  ThrottleQueue notify_queue;
-  std::set<HWND> processed;
-
-  ThrottleQueue::iterator it = throttle_queue->begin();
-  while (it != throttle_queue->end()) {
-    const MSG& msg = *it;
-    if (processed.find(msg.hwnd) == processed.end()) {
-      processed.insert(msg.hwnd);
-      notify_queue.push_back(msg);
-      it = throttle_queue->erase(it);
-    } else {
-      it++;
-    }
-  }
-
-  // Due to re-entrancy, we must save our queue state now.  Otherwise, we may
-  // self-post below, and *also* start up another delayed task when the first
-  // entry is pushed onto the queue in ThrottleMessage().
-  bool throttle_queue_was_empty = throttle_queue->empty();
-
-  for (it = notify_queue.begin(); it != notify_queue.end(); ++it) {
-    const MSG& msg = *it;
-    WNDPROC proc = reinterpret_cast<WNDPROC>(msg.time);
-    // It is possible that the window was closed after we queued
-    // this message.  This is a rare event; just verify the window
-    // is alive.  (see also bug 1259488)
-    if (IsWindow(msg.hwnd))
-      CallWindowProc(proc, msg.hwnd, msg.message, msg.wParam, msg.lParam);
-  }
-
-  if (!throttle_queue_was_empty) {
-    base::MessageLoop::current()->PostDelayedTask(
-        FROM_HERE,
-        base::Bind(&WebPluginDelegateImpl::OnThrottleMessage),
-        base::TimeDelta::FromMilliseconds(kFlashWMUSERMessageThrottleDelayMs));
-  }
-}
-
-// Schedule a windows message for delivery later.
-// static
-void WebPluginDelegateImpl::ThrottleMessage(WNDPROC proc, HWND hwnd,
-                                            UINT message, WPARAM wParam,
-                                            LPARAM lParam) {
-  MSG msg;
-  msg.time = reinterpret_cast<DWORD>(proc);
-  msg.hwnd = hwnd;
-  msg.message = message;
-  msg.wParam = wParam;
-  msg.lParam = lParam;
-
-  ThrottleQueue* throttle_queue = g_throttle_queue.Pointer();
-
-  throttle_queue->push_back(msg);
-
-  if (throttle_queue->size() == 1) {
-    base::MessageLoop::current()->PostDelayedTask(
-        FROM_HERE,
-        base::Bind(&WebPluginDelegateImpl::OnThrottleMessage),
-        base::TimeDelta::FromMilliseconds(kFlashWMUSERMessageThrottleDelayMs));
-  }
-}
-
-// We go out of our way to find the hidden windows created by Flash for
-// windowless plugins.  We throttle the rate at which they deliver messages
-// so that they will not consume outrageous amounts of CPU.
-// static
-LRESULT CALLBACK WebPluginDelegateImpl::FlashWindowlessWndProc(
-    HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam) {
-  std::map<HWND, WNDPROC>::iterator index =
-      g_window_handle_proc_map.Get().find(hwnd);
-
-  WNDPROC old_proc = (*index).second;
-  DCHECK(old_proc);
-
-  switch (message) {
-    case WM_NCDESTROY: {
-      WebPluginDelegateImpl::ClearThrottleQueueForWindow(hwnd);
-      g_window_handle_proc_map.Get().erase(index);
-      break;
-    }
-    // Flash may flood the message queue with WM_USER+1 message causing 100% CPU
-    // usage.  See https://bugzilla.mozilla.org/show_bug.cgi?id=132759.  We
-    // prevent this by throttling the messages.
-    case WM_USER + 1: {
-      WebPluginDelegateImpl::ThrottleMessage(old_proc, hwnd, message, wparam,
-                                             lparam);
-      return TRUE;
-    }
-
-    default: {
-      break;
-    }
-  }
-  return CallWindowProc(old_proc, hwnd, message, wparam, lparam);
-}
-
-LRESULT CALLBACK WebPluginDelegateImpl::DummyWindowProc(
-    HWND hwnd, UINT message, WPARAM w_param, LPARAM l_param) {
-  WebPluginDelegateImpl* delegate = reinterpret_cast<WebPluginDelegateImpl*>(
-      GetProp(hwnd, kWebPluginDelegateProperty));
-  CHECK(delegate);
-  if (message == WM_WINDOWPOSCHANGING) {
-    // We need to know when the dummy window is parented because windowless
-    // plugins need the parent window for things like menus. There's no message
-    // for a parent being changed, but a WM_WINDOWPOSCHANGING is sent so we
-    // check every time we get it.
-    // For non-aura builds, this never changes since RenderWidgetHostViewWin's
-    // window is constant. For aura builds, this changes every time the tab gets
-    // dragged to a new window.
-    HWND parent = GetParent(hwnd);
-    if (parent != delegate->dummy_window_parent_) {
-      delegate->dummy_window_parent_ = parent;
-
-      // Set the containing window handle as the instance window handle. This is
-      // what Safari does. Not having a valid window handle causes subtle bugs
-      // with plugins which retrieve the window handle and use it for things
-      // like context menus. The window handle can be retrieved via
-      // NPN_GetValue of NPNVnetscapeWindow.
-      delegate->instance_->set_window_handle(parent);
-
-      // The plugin caches the result of NPNVnetscapeWindow when we originally
-      // called NPP_SetWindow, so force it to get the new value.
-      delegate->WindowlessSetWindow();
-    }
-  } else if (message == WM_NCDESTROY) {
-    RemoveProp(hwnd, kWebPluginDelegateProperty);
-  }
-  return CallWindowProc(
-      delegate->old_dummy_window_proc_, hwnd, message, w_param, l_param);
-}
-
-// Callback for enumerating the Flash windows.
-BOOL CALLBACK EnumFlashWindows(HWND window, LPARAM arg) {
-  WNDPROC wnd_proc = reinterpret_cast<WNDPROC>(arg);
-  TCHAR class_name[1024];
-  if (!RealGetWindowClass(window, class_name,
-                          sizeof(class_name)/sizeof(TCHAR))) {
-    LOG(ERROR) << "RealGetWindowClass failure: " << GetLastError();
-    return FALSE;
-  }
-
-  if (wcscmp(class_name, L"SWFlash_PlaceholderX"))
-    return TRUE;
-
-  WNDPROC current_wnd_proc = reinterpret_cast<WNDPROC>(
-        GetWindowLongPtr(window, GWLP_WNDPROC));
-  if (current_wnd_proc != wnd_proc) {
-    WNDPROC old_flash_proc = reinterpret_cast<WNDPROC>(SetWindowLongPtr(
-        window, GWLP_WNDPROC,
-        reinterpret_cast<LONG>(wnd_proc)));
-    DCHECK(old_flash_proc);
-    g_window_handle_proc_map.Get()[window] = old_flash_proc;
-  }
-
-  return TRUE;
-}
-
-bool WebPluginDelegateImpl::CreateDummyWindowForActivation() {
-  DCHECK(!dummy_window_for_activation_);
-
-  dummy_window_for_activation_ = CreateWindowEx(
-    0,
-    L"Static",
-    kDummyActivationWindowName,
-    WS_CHILD,
-    0,
-    0,
-    0,
-    0,
-    // We don't know the parent of the dummy window yet, so just set it to the
-    // desktop and it'll get parented by the browser.
-      GetDefaultWindowParent(),
-    0,
-    GetModuleHandle(NULL),
-    0);
-
-  if (dummy_window_for_activation_ == 0)
-    return false;
-
-  BOOL result = SetProp(dummy_window_for_activation_,
-                        kWebPluginDelegateProperty, this);
-  DCHECK(result == TRUE) << "SetProp failed, last error = " << GetLastError();
-  old_dummy_window_proc_ = reinterpret_cast<WNDPROC>(SetWindowLongPtr(
-      dummy_window_for_activation_, GWLP_WNDPROC,
-      reinterpret_cast<LONG>(DummyWindowProc)));
-
-  // Flash creates background windows which use excessive CPU in our
-  // environment; we wrap these windows and throttle them so that they don't
-  // get out of hand.
-  if (!EnumThreadWindows(::GetCurrentThreadId(), EnumFlashWindows,
-      reinterpret_cast<LPARAM>(
-      &WebPluginDelegateImpl::FlashWindowlessWndProc))) {
-    // Log that this happened.  Flash will still work; it just means the
-    // throttle isn't installed (and Flash will use more CPU).
-    NOTREACHED();
-    LOG(ERROR) << "Failed to wrap all windowless Flash windows";
-  }
-  return true;
-}
-
-bool WebPluginDelegateImpl::WindowedReposition(
-    const gfx::Rect& window_rect_in_dip,
-    const gfx::Rect& clip_rect_in_dip) {
-  if (!windowed_handle_) {
-    NOTREACHED();
-    return false;
-  }
-
-  gfx::Rect window_rect = ui::win::DIPToScreenRect(window_rect_in_dip);
-  gfx::Rect clip_rect = ui::win::DIPToScreenRect(clip_rect_in_dip);
-  if (window_rect_ == window_rect && clip_rect_ == clip_rect)
-    return false;
-
-  // We only set the plugin's size here.  Its position is moved elsewhere, which
-  // allows the window moves/scrolling/clipping to be synchronized with the page
-  // and other windows.
-  // If the plugin window has no parent, then don't focus it because it isn't
-  // being displayed anywhere. See:
-  // http://code.google.com/p/chromium/issues/detail?id=32658
-  if (window_rect.size() != window_rect_.size()) {
-    UINT flags = SWP_NOMOVE | SWP_NOZORDER;
-    if (!GetParent(windowed_handle_))
-      flags |= SWP_NOACTIVATE;
-    ::SetWindowPos(windowed_handle_,
-                   NULL,
-                   0,
-                   0,
-                   window_rect.width(),
-                   window_rect.height(),
-                   flags);
-  }
-
-  window_rect_ = window_rect;
-  clip_rect_ = clip_rect;
-
-  // Ensure that the entire window gets repainted.
-  ::InvalidateRect(windowed_handle_, NULL, FALSE);
-
-  return true;
-}
-
-void WebPluginDelegateImpl::WindowedSetWindow() {
-  if (!instance_)
-    return;
-
-  if (!windowed_handle_) {
-    NOTREACHED();
-    return;
-  }
-
-  instance()->set_window_handle(windowed_handle_);
-
-  DCHECK(!instance()->windowless());
-
-  window_.clipRect.top = std::max(0, clip_rect_.y());
-  window_.clipRect.left = std::max(0, clip_rect_.x());
-  window_.clipRect.bottom = std::max(0, clip_rect_.y() + clip_rect_.height());
-  window_.clipRect.right = std::max(0, clip_rect_.x() + clip_rect_.width());
-  window_.height = window_rect_.height();
-  window_.width = window_rect_.width();
-  window_.x = 0;
-  window_.y = 0;
-
-  window_.window = windowed_handle_;
-  window_.type = NPWindowTypeWindow;
-
-  // Reset this flag before entering the instance in case of side-effects.
-  windowed_did_set_window_ = true;
-
-  NPError err = instance()->NPP_SetWindow(&window_);
-  if (quirks_ & PLUGIN_QUIRK_SETWINDOW_TWICE)
-    instance()->NPP_SetWindow(&window_);
-
-  WNDPROC current_wnd_proc = reinterpret_cast<WNDPROC>(
-        GetWindowLongPtr(windowed_handle_, GWLP_WNDPROC));
-  if (current_wnd_proc != NativeWndProc) {
-    plugin_wnd_proc_ = reinterpret_cast<WNDPROC>(SetWindowLongPtr(
-        windowed_handle_, GWLP_WNDPROC, reinterpret_cast<LONG>(NativeWndProc)));
-  }
-}
-
-ATOM WebPluginDelegateImpl::RegisterNativeWindowClass() {
-  static bool have_registered_window_class = false;
-  if (have_registered_window_class == true)
-    return true;
-
-  have_registered_window_class = true;
-
-  WNDCLASSEX wcex;
-  wcex.cbSize         = sizeof(WNDCLASSEX);
-  wcex.style          = CS_DBLCLKS;
-  wcex.lpfnWndProc    = WrapperWindowProc;
-  wcex.cbClsExtra     = 0;
-  wcex.cbWndExtra     = 0;
-  wcex.hInstance      = GetModuleHandle(NULL);
-  wcex.hIcon          = 0;
-  wcex.hCursor        = 0;
-  // Some plugins like windows media player 11 create child windows parented
-  // by our plugin window, where the media content is rendered. These plugins
-  // dont implement WM_ERASEBKGND, which causes painting issues, when the
-  // window where the media is rendered is moved around. DefWindowProc does
-  // implement WM_ERASEBKGND correctly if we have a valid background brush.
-  wcex.hbrBackground  = reinterpret_cast<HBRUSH>(COLOR_WINDOW+1);
-  wcex.lpszMenuName   = 0;
-  wcex.lpszClassName  = kNativeWindowClassName;
-  wcex.hIconSm        = 0;
-
-  return RegisterClassEx(&wcex);
-}
-
-LRESULT CALLBACK WebPluginDelegateImpl::WrapperWindowProc(
-    HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
-  // This is another workaround for Issue 2673 in chromium "Flash: IME not
-  // available". Somehow, the CallWindowProc() function does not dispatch
-  // window messages when its first parameter is a handle representing the
-  // DefWindowProc() function. To avoid this problem, this code creates a
-  // wrapper function which just encapsulates the DefWindowProc() function
-  // and set it as the window procedure of a windowed plug-in.
-  return DefWindowProc(hWnd, message, wParam, lParam);
-}
-
-// Returns true if the message passed in corresponds to a user gesture.
-static bool IsUserGestureMessage(unsigned int message) {
-  switch (message) {
-    case WM_LBUTTONDOWN:
-    case WM_LBUTTONUP:
-    case WM_RBUTTONDOWN:
-    case WM_RBUTTONUP:
-    case WM_MBUTTONDOWN:
-    case WM_MBUTTONUP:
-    case WM_KEYDOWN:
-    case WM_KEYUP:
-      return true;
-
-    default:
-      break;
-  }
-
-  return false;
-}
-
-LRESULT CALLBACK WebPluginDelegateImpl::NativeWndProc(
-    HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam) {
-  WebPluginDelegateImpl* delegate = reinterpret_cast<WebPluginDelegateImpl*>(
-      GetProp(hwnd, kWebPluginDelegateProperty));
-  if (!delegate) {
-    NOTREACHED();
-    return 0;
-  }
-
-  if (message == delegate->last_message_ &&
-      delegate->GetQuirks() & PLUGIN_QUIRK_DONT_CALL_WND_PROC_RECURSIVELY &&
-      delegate->is_calling_wndproc) {
-    // Real may go into a state where it recursively dispatches the same event
-    // when subclassed.  See https://bugzilla.mozilla.org/show_bug.cgi?id=192914
-    // We only do the recursive check for Real because it's possible and valid
-    // for a plugin to synchronously dispatch a message to itself such that it
-    // looks like it's in recursion.
-    return TRUE;
-  }
-
-  // Flash may flood the message queue with WM_USER+1 message causing 100% CPU
-  // usage.  See https://bugzilla.mozilla.org/show_bug.cgi?id=132759.  We
-  // prevent this by throttling the messages.
-  if (message == WM_USER + 1 &&
-      delegate->GetQuirks() & PLUGIN_QUIRK_THROTTLE_WM_USER_PLUS_ONE) {
-    WebPluginDelegateImpl::ThrottleMessage(delegate->plugin_wnd_proc_, hwnd,
-                                           message, wparam, lparam);
-    return FALSE;
-  }
-
-  LRESULT result;
-  uint32 old_message = delegate->last_message_;
-  delegate->last_message_ = message;
-
-  static UINT custom_msg = RegisterWindowMessage(kPaintMessageName);
-  if (message == custom_msg) {
-    // Get the invalid rect which is in screen coordinates and convert to
-    // window coordinates.
-    gfx::Rect invalid_rect;
-    invalid_rect.set_x(wparam >> 16);
-    invalid_rect.set_y(wparam & 0xFFFF);
-    invalid_rect.set_width(lparam >> 16);
-    invalid_rect.set_height(lparam & 0xFFFF);
-
-    RECT window_rect;
-    GetWindowRect(hwnd, &window_rect);
-    invalid_rect.Offset(-window_rect.left, -window_rect.top);
-
-    // The plugin window might have non-client area.   If we don't pass in
-    // RDW_FRAME then the children don't receive WM_NCPAINT messages while
-    // scrolling, which causes painting problems (http://b/issue?id=923945).
-    uint32 flags = RDW_INVALIDATE | RDW_ALLCHILDREN | RDW_FRAME;
-
-    // If a plugin (like Google Earth or Java) has child windows that are hosted
-    // in a different process, then RedrawWindow with UPDATENOW will
-    // synchronously wait for this call to complete.  Some messages are pumped
-    // but not others, which could lead to a deadlock.  So avoid reentrancy by
-    // only synchronously calling RedrawWindow once at a time.
-    if (old_message != custom_msg)
-      flags |= RDW_UPDATENOW;
-    RECT rect = invalid_rect.ToRECT();
-    RedrawWindow(hwnd, &rect, NULL, flags);
-    result = FALSE;
-  } else {
-    delegate->is_calling_wndproc = true;
-
-    if (!delegate->user_gesture_message_posted_ &&
-        IsUserGestureMessage(message)) {
-      delegate->user_gesture_message_posted_ = true;
-
-      delegate->instance()->PushPopupsEnabledState(true);
-
-      base::MessageLoop::current()->PostDelayedTask(
-          FROM_HERE,
-          base::Bind(&WebPluginDelegateImpl::OnUserGestureEnd,
-                     delegate->user_gesture_msg_factory_.GetWeakPtr()),
-          base::TimeDelta::FromMilliseconds(kWindowedPluginPopupTimerMs));
-    }
-
-    HandleCaptureForMessage(hwnd, message);
-
-    // Maintain a local/global stack for the g_current_plugin_instance variable
-    // as this may be a nested invocation.
-    WebPluginDelegateImpl* last_plugin_instance = g_current_plugin_instance;
-
-    g_current_plugin_instance = delegate;
-
-    result = CallWindowProc(
-        delegate->plugin_wnd_proc_, hwnd, message, wparam, lparam);
-
-    delegate->is_calling_wndproc = false;
-    g_current_plugin_instance = last_plugin_instance;
-
-    if (message == WM_NCDESTROY) {
-      RemoveProp(hwnd, kWebPluginDelegateProperty);
-      ATOM plugin_name_atom = reinterpret_cast<ATOM>(
-          RemoveProp(hwnd, kPluginNameAtomProperty));
-      if (plugin_name_atom != 0)
-        GlobalDeleteAtom(plugin_name_atom);
-      ATOM plugin_version_atom = reinterpret_cast<ATOM>(
-          RemoveProp(hwnd, kPluginVersionAtomProperty));
-      if (plugin_version_atom != 0)
-        GlobalDeleteAtom(plugin_version_atom);
-      ClearThrottleQueueForWindow(hwnd);
-    }
-  }
-  delegate->last_message_ = old_message;
-  return result;
-}
-
-void WebPluginDelegateImpl::WindowlessUpdateGeometry(
-    const gfx::Rect& window_rect,
-    const gfx::Rect& clip_rect) {
-  bool window_rect_changed = (window_rect_ != window_rect);
-  // Only resend to the instance if the geometry has changed.
-  if (!window_rect_changed && clip_rect == clip_rect_)
-    return;
-
-  clip_rect_ = clip_rect;
-  window_rect_ = window_rect;
-
-  WindowlessSetWindow();
-
-  if (window_rect_changed) {
-    WINDOWPOS win_pos = {0};
-    win_pos.x = window_rect_.x();
-    win_pos.y = window_rect_.y();
-    win_pos.cx = window_rect_.width();
-    win_pos.cy = window_rect_.height();
-
-    NPEvent pos_changed_event;
-    pos_changed_event.event = WM_WINDOWPOSCHANGED;
-    pos_changed_event.wParam = 0;
-    pos_changed_event.lParam = PtrToUlong(&win_pos);
-
-    instance()->NPP_HandleEvent(&pos_changed_event);
-  }
-}
-
-void WebPluginDelegateImpl::WindowlessPaint(HDC hdc,
-                                            const gfx::Rect& damage_rect) {
-  DCHECK(hdc);
-
-  RECT damage_rect_win;
-  damage_rect_win.left   = damage_rect.x();  // + window_rect_.x();
-  damage_rect_win.top    = damage_rect.y();  // + window_rect_.y();
-  damage_rect_win.right  = damage_rect_win.left + damage_rect.width();
-  damage_rect_win.bottom = damage_rect_win.top + damage_rect.height();
-
-  // Save away the old HDC as this could be a nested invocation.
-  void* old_dc = window_.window;
-  window_.window = hdc;
-
-  NPEvent paint_event;
-  paint_event.event = WM_PAINT;
-  // NOTE: NPAPI is not 64bit safe.  It puts pointers into 32bit values.
-  paint_event.wParam = PtrToUlong(hdc);
-  paint_event.lParam = PtrToUlong(&damage_rect_win);
-  base::StatsRate plugin_paint("Plugin.Paint");
-  base::StatsScope<base::StatsRate> scope(plugin_paint);
-  instance()->NPP_HandleEvent(&paint_event);
-  window_.window = old_dc;
-}
-
-void WebPluginDelegateImpl::WindowlessSetWindow() {
-  if (!instance())
-    return;
-
-  if (window_rect_.IsEmpty())  // wait for geometry to be set.
-    return;
-
-  DCHECK(instance()->windowless());
-
-  window_.clipRect.top = clip_rect_.y();
-  window_.clipRect.left = clip_rect_.x();
-  window_.clipRect.bottom = clip_rect_.y() + clip_rect_.height();
-  window_.clipRect.right = clip_rect_.x() + clip_rect_.width();
-  window_.height = window_rect_.height();
-  window_.width = window_rect_.width();
-  window_.x = window_rect_.x();
-  window_.y = window_rect_.y();
-  window_.type = NPWindowTypeDrawable;
-  DrawableContextEnforcer enforcer(&window_);
-
-  NPError err = instance()->NPP_SetWindow(&window_);
-  DCHECK(err == NPERR_NO_ERROR);
-}
-
-bool WebPluginDelegateImpl::PlatformSetPluginHasFocus(bool focused) {
-  DCHECK(instance()->windowless());
-
-  NPEvent focus_event;
-  focus_event.event = focused ? WM_SETFOCUS : WM_KILLFOCUS;
-  focus_event.wParam = 0;
-  focus_event.lParam = 0;
-
-  instance()->NPP_HandleEvent(&focus_event);
-  return true;
-}
-
-static bool NPEventFromWebMouseEvent(const WebMouseEvent& event,
-                                     NPEvent* np_event) {
-  np_event->lParam = static_cast<uint32>(MAKELPARAM(event.windowX,
-                                                   event.windowY));
-  np_event->wParam = 0;
-
-  if (event.modifiers & WebInputEvent::ControlKey)
-    np_event->wParam |= MK_CONTROL;
-  if (event.modifiers & WebInputEvent::ShiftKey)
-    np_event->wParam |= MK_SHIFT;
-  if (event.modifiers & WebInputEvent::LeftButtonDown)
-    np_event->wParam |= MK_LBUTTON;
-  if (event.modifiers & WebInputEvent::MiddleButtonDown)
-    np_event->wParam |= MK_MBUTTON;
-  if (event.modifiers & WebInputEvent::RightButtonDown)
-    np_event->wParam |= MK_RBUTTON;
-
-  switch (event.type) {
-    case WebInputEvent::MouseMove:
-    case WebInputEvent::MouseLeave:
-    case WebInputEvent::MouseEnter:
-      np_event->event = WM_MOUSEMOVE;
-      return true;
-    case WebInputEvent::MouseDown:
-      switch (event.button) {
-        case WebMouseEvent::ButtonLeft:
-          np_event->event = WM_LBUTTONDOWN;
-          break;
-        case WebMouseEvent::ButtonMiddle:
-          np_event->event = WM_MBUTTONDOWN;
-          break;
-        case WebMouseEvent::ButtonRight:
-          np_event->event = WM_RBUTTONDOWN;
-          break;
-      }
-      return true;
-    case WebInputEvent::MouseUp:
-      switch (event.button) {
-        case WebMouseEvent::ButtonLeft:
-          np_event->event = WM_LBUTTONUP;
-          break;
-        case WebMouseEvent::ButtonMiddle:
-          np_event->event = WM_MBUTTONUP;
-          break;
-        case WebMouseEvent::ButtonRight:
-          np_event->event = WM_RBUTTONUP;
-          break;
-      }
-      return true;
-    default:
-      NOTREACHED();
-      return false;
-  }
-}
-
-static bool NPEventFromWebKeyboardEvent(const WebKeyboardEvent& event,
-                                        NPEvent* np_event) {
-  np_event->wParam = event.windowsKeyCode;
-
-  switch (event.type) {
-    case WebInputEvent::KeyDown:
-      np_event->event = WM_KEYDOWN;
-      np_event->lParam = 0;
-      return true;
-    case WebInputEvent::Char:
-      np_event->event = WM_CHAR;
-      np_event->lParam = 0;
-      return true;
-    case WebInputEvent::KeyUp:
-      np_event->event = WM_KEYUP;
-      np_event->lParam = 0x8000;
-      return true;
-    default:
-      NOTREACHED();
-      return false;
-  }
-}
-
-static bool NPEventFromWebInputEvent(const WebInputEvent& event,
-                                     NPEvent* np_event) {
-  switch (event.type) {
-    case WebInputEvent::MouseMove:
-    case WebInputEvent::MouseLeave:
-    case WebInputEvent::MouseEnter:
-    case WebInputEvent::MouseDown:
-    case WebInputEvent::MouseUp:
-      if (event.size < sizeof(WebMouseEvent)) {
-        NOTREACHED();
-        return false;
-      }
-      return NPEventFromWebMouseEvent(
-          *static_cast<const WebMouseEvent*>(&event), np_event);
-    case WebInputEvent::KeyDown:
-    case WebInputEvent::Char:
-    case WebInputEvent::KeyUp:
-      if (event.size < sizeof(WebKeyboardEvent)) {
-        NOTREACHED();
-        return false;
-      }
-      return NPEventFromWebKeyboardEvent(
-          *static_cast<const WebKeyboardEvent*>(&event), np_event);
-    default:
-      return false;
-  }
-}
-
-bool WebPluginDelegateImpl::PlatformHandleInputEvent(
-    const WebInputEvent& event, WebCursor::CursorInfo* cursor_info) {
-  DCHECK(cursor_info != NULL);
-
-  NPEvent np_event;
-  if (!NPEventFromWebInputEvent(event, &np_event)) {
-    return false;
-  }
-
-  // Allow this plug-in to access this IME emulator through IMM32 API while the
-  // plug-in is processing this event.
-  if (GetQuirks() & PLUGIN_QUIRK_EMULATE_IME) {
-    if (!plugin_ime_)
-      plugin_ime_.reset(new WebPluginIMEWin);
-  }
-  WebPluginIMEWin::ScopedLock lock(
-      event.isKeyboardEventType(event.type) ? plugin_ime_.get() : NULL);
-
-  HWND last_focus_window = NULL;
-
-  if (ShouldTrackEventForModalLoops(&np_event)) {
-    // A windowless plugin can enter a modal loop in a NPP_HandleEvent call.
-    // For e.g. Flash puts up a context menu when we right click on the
-    // windowless plugin area. We detect this by setting up a message filter
-    // hook pror to calling NPP_HandleEvent on the plugin and unhook on
-    // return from NPP_HandleEvent. If the plugin does enter a modal loop
-    // in that context we unhook on receiving the first notification in
-    // the message filter hook.
-    handle_event_message_filter_hook_ =
-        SetWindowsHookEx(WH_MSGFILTER, HandleEventMessageFilterHook, NULL,
-                         GetCurrentThreadId());
-    // To ensure that the plugin receives keyboard events we set focus to the
-    // dummy window.
-    // TODO(iyengar) We need a framework in the renderer to identify which
-    // windowless plugin is under the mouse and to handle this. This would
-    // also require some changes in RenderWidgetHost to detect this in the
-    // WM_MOUSEACTIVATE handler and inform the renderer accordingly.
-    bool valid =
-        GetParent(dummy_window_for_activation_) != GetDefaultWindowParent();
-    if (valid) {
-      last_focus_window = ::SetFocus(dummy_window_for_activation_);
-    } else {
-      NOTREACHED() << "Dummy window not parented";
-    }
-  }
-
-  bool old_task_reentrancy_state =
-      base::MessageLoop::current()->NestableTasksAllowed();
-
-  // Maintain a local/global stack for the g_current_plugin_instance variable
-  // as this may be a nested invocation.
-  WebPluginDelegateImpl* last_plugin_instance = g_current_plugin_instance;
-
-  g_current_plugin_instance = this;
-
-  handle_event_depth_++;
-
-  bool popups_enabled = false;
-
-  if (IsUserGestureMessage(np_event.event)) {
-    instance()->PushPopupsEnabledState(true);
-    popups_enabled = true;
-  }
-
-  bool ret = instance()->NPP_HandleEvent(&np_event) != 0;
-
-  if (popups_enabled) {
-    instance()->PopPopupsEnabledState();
-  }
-
-  // Flash and SilverLight always return false, even when they swallow the
-  // event.  Flash does this because it passes the event to its window proc,
-  // which is supposed to return 0 if an event was handled.  There are few
-  // exceptions, such as IME, where it sometimes returns true.
-  ret = true;
-
-  if (np_event.event == WM_MOUSEMOVE) {
-    current_windowless_cursor_.InitFromExternalCursor(GetCursor());
-    // Snag a reference to the current cursor ASAP in case the plugin modified
-    // it. There is a nasty race condition here with the multiprocess browser
-    // as someone might be setting the cursor in the main process as well.
-    current_windowless_cursor_.GetCursorInfo(cursor_info);
-  }
-
-  handle_event_depth_--;
-
-  g_current_plugin_instance = last_plugin_instance;
-
-  // We could have multiple NPP_HandleEvent calls nested together in case
-  // the plugin enters a modal loop. Reset the pump messages event when
-  // the outermost NPP_HandleEvent call unwinds.
-  if (handle_event_depth_ == 0) {
-    ResetEvent(handle_event_pump_messages_event_);
-  }
-
-  if (::IsWindow(last_focus_window)) {
-    // Restore the nestable tasks allowed state in the message loop and reset
-    // the os modal loop state as the plugin returned from the TrackPopupMenu
-    // API call.
-    base::MessageLoop::current()->SetNestableTasksAllowed(
-        old_task_reentrancy_state);
-    base::MessageLoop::current()->set_os_modal_loop(false);
-    // The Flash plugin at times sets focus to its hidden top level window
-    // with class name SWFlash_PlaceholderX. This causes the chrome browser
-    // window to receive a WM_ACTIVATEAPP message as a top level window from
-    // another thread is now active. We end up in a state where the chrome
-    // browser window is not active even though the user clicked on it.
-    // Our workaround for this is to send over a raw
-    // WM_LBUTTONDOWN/WM_LBUTTONUP combination to the last focus window, which
-    // does the trick.
-    if (dummy_window_for_activation_ != ::GetFocus()) {
-      INPUT input_info = {0};
-      input_info.type = INPUT_MOUSE;
-      input_info.mi.dwFlags = MOUSEEVENTF_LEFTDOWN;
-      ::SendInput(1, &input_info, sizeof(INPUT));
-
-      input_info.type = INPUT_MOUSE;
-      input_info.mi.dwFlags = MOUSEEVENTF_LEFTUP;
-      ::SendInput(1, &input_info, sizeof(INPUT));
-    } else {
-      ::SetFocus(last_focus_window);
-    }
-  }
-  return ret;
-}
-
-
-void WebPluginDelegateImpl::OnModalLoopEntered() {
-  DCHECK(handle_event_pump_messages_event_ != NULL);
-  SetEvent(handle_event_pump_messages_event_);
-
-  base::MessageLoop::current()->SetNestableTasksAllowed(true);
-  base::MessageLoop::current()->set_os_modal_loop(true);
-
-  UnhookWindowsHookEx(handle_event_message_filter_hook_);
-  handle_event_message_filter_hook_ = NULL;
-}
-
-bool WebPluginDelegateImpl::ShouldTrackEventForModalLoops(NPEvent* event) {
-  if (event->event == WM_RBUTTONDOWN)
-    return true;
-  return false;
-}
-
-void WebPluginDelegateImpl::OnUserGestureEnd() {
-  user_gesture_message_posted_ = false;
-  instance()->PopPopupsEnabledState();
-}
-
-BOOL WINAPI WebPluginDelegateImpl::TrackPopupMenuPatch(
-    HMENU menu, unsigned int flags, int x, int y, int reserved,
-    HWND window, const RECT* rect) {
-
-  if (g_current_plugin_instance) {
-    unsigned long window_process_id = 0;
-    unsigned long window_thread_id =
-        GetWindowThreadProcessId(window, &window_process_id);
-    // TrackPopupMenu fails if the window passed in belongs to a different
-    // thread.
-    if (::GetCurrentThreadId() != window_thread_id) {
-      bool valid =
-          GetParent(g_current_plugin_instance->dummy_window_for_activation_) !=
-              GetDefaultWindowParent();
-      if (valid) {
-        window = g_current_plugin_instance->dummy_window_for_activation_;
-      } else {
-        NOTREACHED() << "Dummy window not parented";
-      }
-    }
-  }
-
-  BOOL result = TrackPopupMenu(menu, flags, x, y, reserved, window, rect);
-  return result;
-}
-
-HCURSOR WINAPI WebPluginDelegateImpl::SetCursorPatch(HCURSOR cursor) {
-  // The windowless flash plugin periodically calls SetCursor in a wndproc
-  // instantiated on the plugin thread. This causes annoying cursor flicker
-  // when the mouse is moved on a foreground tab, with a windowless plugin
-  // instance in a background tab. We just ignore the call here.
-  if (!g_current_plugin_instance) {
-    HCURSOR current_cursor = GetCursor();
-    if (current_cursor != cursor) {
-      ::SetCursor(cursor);
-    }
-    return current_cursor;
-  }
-  return ::SetCursor(cursor);
-}
-
-LONG WINAPI WebPluginDelegateImpl::RegEnumKeyExWPatch(
-    HKEY key, DWORD index, LPWSTR name, LPDWORD name_size, LPDWORD reserved,
-    LPWSTR class_name, LPDWORD class_size, PFILETIME last_write_time) {
-  DWORD orig_size = *name_size;
-  LONG rv = RegEnumKeyExW(key, index, name, name_size, reserved, class_name,
-                          class_size, last_write_time);
-  if (rv == ERROR_SUCCESS &&
-      GetKeyPath(key).find(L"Microsoft\\MediaPlayer\\ShimInclusionList") !=
-          std::wstring::npos) {
-    static const wchar_t kChromeExeName[] = L"chrome.exe";
-    wcsncpy_s(name, orig_size, kChromeExeName, arraysize(kChromeExeName));
-    *name_size =
-        std::min(orig_size, static_cast<DWORD>(arraysize(kChromeExeName)));
-  }
-
-  return rv;
-}
-
-void WebPluginDelegateImpl::ImeCompositionUpdated(
-    const base::string16& text,
-    const std::vector<int>& clauses,
-    const std::vector<int>& target,
-    int cursor_position) {
-  if (!plugin_ime_)
-    plugin_ime_.reset(new WebPluginIMEWin);
-
-  plugin_ime_->CompositionUpdated(text, clauses, target, cursor_position);
-  plugin_ime_->SendEvents(instance());
-}
-
-void WebPluginDelegateImpl::ImeCompositionCompleted(
-    const base::string16& text) {
-  if (!plugin_ime_)
-    plugin_ime_.reset(new WebPluginIMEWin);
-  plugin_ime_->CompositionCompleted(text);
-  plugin_ime_->SendEvents(instance());
-}
-
-bool WebPluginDelegateImpl::GetIMEStatus(int* input_type,
-                                         gfx::Rect* caret_rect) {
-  if (!plugin_ime_)
-    return false;
-  return plugin_ime_->GetStatus(input_type, caret_rect);
-}
-
-// static
-FARPROC WINAPI WebPluginDelegateImpl::GetProcAddressPatch(HMODULE module,
-                                                          LPCSTR name) {
-  FARPROC imm_function = WebPluginIMEWin::GetProcAddress(name);
-  if (imm_function)
-    return imm_function;
-  return ::GetProcAddress(module, name);
-}
-
-void WebPluginDelegateImpl::HandleCaptureForMessage(HWND window,
-                                                    UINT message) {
-  if (!WebPluginDelegateImpl::IsPluginDelegateWindow(window))
-    return;
-
-  switch (message) {
-    case WM_LBUTTONDOWN:
-    case WM_MBUTTONDOWN:
-    case WM_RBUTTONDOWN:
-      ::SetCapture(window);
-      // As per documentation the WM_PARENTNOTIFY message is sent to the parent
-      // window chain if mouse input is received by the child window. However
-      // the parent receives the WM_PARENTNOTIFY message only if we doubleclick
-      // on the window. We send the WM_PARENTNOTIFY message for mouse input
-      // messages to the parent to indicate that user action is expected.
-      ::SendMessage(::GetParent(window), WM_PARENTNOTIFY, message, 0);
-      break;
-
-    case WM_LBUTTONUP:
-    case WM_MBUTTONUP:
-    case WM_RBUTTONUP:
-      ::ReleaseCapture();
-      break;
-
-    default:
-      break;
-  }
-}
-
-}  // namespace npapi
-}  // namespace webkit