Unbreak tabs.onRemove extension API in face of fast tab closure

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/debug/trace_event.h"
@@ skipping 332 matching lines @@
       load_state_(net::LOAD_STATE_IDLE, string16()),
       upload_size_(0),
       upload_position_(0),
       displayed_insecure_content_(false),
       capturer_count_(0),
       should_normally_be_visible_(true),
       is_being_destroyed_(false),
       notify_disconnection_(false),
       dialog_manager_(NULL),
       is_showing_before_unload_dialog_(false),
+      detached_as_part_of_unload_(false),
       closed_by_user_gesture_(false),
       minimum_zoom_percent_(static_cast<int>(kMinimumZoomFactor * 100)),
       maximum_zoom_percent_(static_cast<int>(kMaximumZoomFactor * 100)),
       temporary_zoom_settings_(false),
       content_restrictions_(0),
       color_chooser_identifier_(0),
       message_source_(NULL),
       fullscreen_widget_routing_id_(MSG_ROUTING_NONE) {
   for (size_t i = 0; i < g_created_callbacks.Get().size(); i++)
     g_created_callbacks.Get().at(i).Run(this);
@@ skipping 1608 matching lines @@
 void WebContentsImpl::OnCloseCanceled() {
   close_start_time_ = base::TimeTicks();
   before_unload_end_time_ = base::TimeTicks();
   unload_detached_start_time_ = base::TimeTicks();
 }
 
 void WebContentsImpl::OnUnloadStarted() {
   before_unload_end_time_ = base::TimeTicks::Now();
 }
 
+void WebContentsImpl::OnUnloadAboutToDetach() {
+  detached_as_part_of_unload_ = true;
+}
+
 void WebContentsImpl::OnUnloadDetachedStarted() {
   if (unload_detached_start_time_.is_null())
     unload_detached_start_time_ = base::TimeTicks::Now();
 }
 
 void WebContentsImpl::DragSourceEndedAt(int client_x, int client_y,
     int screen_x, int screen_y, WebKit::WebDragOperation operation) {
   if (browser_plugin_embedder_.get())
     browser_plugin_embedder_->DragSourceEndedAt(client_x, client_y,
         screen_x, screen_y, operation);
@@ skipping 26 matching lines @@
 }
 
 void WebContentsImpl::SetClosedByUserGesture(bool value) {
   closed_by_user_gesture_ = value;
 }
 
 bool WebContentsImpl::GetClosedByUserGesture() const {
   return closed_by_user_gesture_;
 }
 
+bool WebContentsImpl::GetWebContentsDetachedToClose() const {
+  return detached_as_part_of_unload_;
+}
+
 double WebContentsImpl::GetZoomLevel() const {
   HostZoomMapImpl* zoom_map = static_cast<HostZoomMapImpl*>(
       HostZoomMap::GetForBrowserContext(GetBrowserContext()));
   if (!zoom_map)
     return 0;
 
   double zoom_level;
   if (temporary_zoom_settings_) {
     zoom_level = zoom_map->GetTemporaryZoomLevel(
         GetRenderProcessHost()->GetID(), GetRenderViewHost()->GetRoutingID());
@@ skipping 1666 matching lines @@
 }
 
 BrowserPluginGuestManager*
     WebContentsImpl::GetBrowserPluginGuestManager() const {
   return static_cast<BrowserPluginGuestManager*>(
       GetBrowserContext()->GetUserData(
           browser_plugin::kBrowserPluginGuestManagerKeyName));
 }
 
 }  // namespace content