Fix bug where transient pages would miss events dispatched while it was

chrome/browser/extensions/extension_host.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 "chrome/browser/extensions/extension_host.h"
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/memory/singleton.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_shutdown.h"
+#include "chrome/browser/extensions/extension_event_router.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_modal_dialogs/message_box_handler.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/prefs/prefs_tab_helper.h"
@@ skipping 436 matching lines @@
       return;
     }
   }
   UnhandledKeyboardEvent(event);
 }
 
 bool ExtensionHost::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ExtensionHost, message)
     IPC_MESSAGE_HANDLER(ExtensionHostMsg_Request, OnRequest)
+    IPC_MESSAGE_HANDLER(ExtensionHostMsg_EventAck, OnEventAck)
+    IPC_MESSAGE_HANDLER(ExtensionHostMsg_IncrementLazyKeepaliveCount,
+                        OnIncrementLazyKeepaliveCount)
+    IPC_MESSAGE_HANDLER(ExtensionHostMsg_DecrementLazyKeepaliveCount,
+                        OnDecrementLazyKeepaliveCount)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void ExtensionHost::OnRequest(const ExtensionHostMsg_Request_Params& params) {
   extension_function_dispatcher_.Dispatch(params, render_view_host());
 }
 
+void ExtensionHost::OnEventAck() {
+  ExtensionEventRouter* router = ExtensionSystem::Get(profile_)->event_router();
+  if (router)
+    router->OnEventAck(profile_, extension_id());
+}
+
+void ExtensionHost::OnIncrementLazyKeepaliveCount() {
+  ExtensionProcessManager* pm =
+      ExtensionSystem::Get(profile_)->process_manager();
+  if (pm)
+    pm->IncrementLazyKeepaliveCount(extension());
+}
+
+void ExtensionHost::OnDecrementLazyKeepaliveCount() {
+  ExtensionProcessManager* pm =
+      ExtensionSystem::Get(profile_)->process_manager();
+  if (pm)
+    pm->DecrementLazyKeepaliveCount(extension());
+}
+
+
 void ExtensionHost::RenderViewCreated(RenderViewHost* render_view_host) {
   render_view_host_ = render_view_host;
 
   if (view_.get())
     view_->RenderViewCreated();
 
   // If the host is bound to a browser, then extract its window id.
   // Extensions hosted in ExternalTabContainer objects may not have
   // an associated browser.
   const Browser* browser = GetBrowser();
@@ skipping 73 matching lines @@
   params.user_gesture = user_gesture;
   browser::Navigate(&params);
 }
 
 void ExtensionHost::RenderViewReady() {
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSION_HOST_CREATED,
       content::Source<Profile>(profile_),
       content::Details<ExtensionHost>(this));
 }