Fix the issue that any tab/window closing hotkey will crash the Pepper Flash Fullscreen.

content/browser/web_contents/web_contents_impl.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 "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
@@ skipping 344 matching lines @@
       maximum_zoom_percent_(
           static_cast<int>(content::kMaximumZoomFactor * 100)),
       temporary_zoom_settings_(false),
       content_restrictions_(0),
       color_chooser_(NULL) {
 }
 
 WebContentsImpl::~WebContentsImpl() {
   is_being_destroyed_ = true;
 
+  for (std::set<RenderWidgetHostImpl*>::iterator iter =
+           created_widgets_.begin(); iter != created_widgets_.end(); ++iter) {
+    (*iter)->DetachDelegate();
+  }
+  created_widgets_.clear();
+
   // Clear out any JavaScript state.
   if (dialog_creator_)
     dialog_creator_->ResetJavaScriptState(this);
 
   if (color_chooser_)
     color_chooser_->End();
 
   NotifyDisconnected();
 
   // Notify any observer that have a reference on this WebContents.
@@ skipping 779 matching lines @@
 void WebContentsImpl::Deactivate() {
   if (delegate_)
     delegate_->DeactivateContents(this);
 }
 
 void WebContentsImpl::LostCapture() {
   if (delegate_)
     delegate_->LostCapture();
 }
 
+void WebContentsImpl::RenderWidgetDeleted(
+    RenderWidgetHostImpl* render_widget_host) {
+  if (is_being_destroyed_) {
+    // |created_widgets_| might have been destroyed.
+    return;
+  }
+
+  std::set<RenderWidgetHostImpl*>::iterator iter =
+      created_widgets_.find(render_widget_host);
+  if (iter != created_widgets_.end())
+    created_widgets_.erase(iter);
+}
+
 bool WebContentsImpl::PreHandleKeyboardEvent(
     const NativeWebKeyboardEvent& event,
     bool* is_keyboard_shortcut) {
   return delegate_ &&
       delegate_->PreHandleKeyboardEvent(this, event, is_keyboard_shortcut);
 }
 
 void WebContentsImpl::HandleKeyboardEvent(const NativeWebKeyboardEvent& event) {
   if (delegate_)
     delegate_->HandleKeyboardEvent(this, event);
@@ skipping 142 matching lines @@
 void WebContentsImpl::CreateNewFullscreenWidget(int route_id) {
   CreateNewWidget(route_id, true, WebKit::WebPopupTypeNone);
 }
 
 void WebContentsImpl::CreateNewWidget(int route_id,
                                       bool is_fullscreen,
                                       WebKit::WebPopupType popup_type) {
   content::RenderProcessHost* process = GetRenderProcessHost();
   RenderWidgetHostImpl* widget_host =
       new RenderWidgetHostImpl(this, process, route_id);
+  created_widgets_.insert(widget_host);
+
   RenderWidgetHostViewPort* widget_view =
       RenderWidgetHostViewPort::CreateViewForWidget(widget_host);
   if (!is_fullscreen) {
     // Popups should not get activated.
     widget_view->SetPopupType(popup_type);
   }
   // Save the created widget associated with the route so we can show it later.
   pending_widget_views_[route_id] = widget_view;
 
 #if defined(OS_MACOSX)
@@ skipping 1956 matching lines @@
       old_browser_plugin_host()->embedder_render_process_host();
   *embedder_container_id = old_browser_plugin_host()->instance_id();
   int embedder_process_id =
       embedder_render_process_host ? embedder_render_process_host->GetID() : -1;
   if (embedder_process_id != -1) {
     *embedder_channel_name =
         StringPrintf("%d.r%d", render_view_host->GetProcess()->GetID(),
                      embedder_process_id);
   }
 }