Refactor RenderWidgetHost::set_paint_observer()

chrome/browser/notifications/balloon_host.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_NOTIFICATIONS_BALLOON_HOST_H_
 #define CHROME_BROWSER_NOTIFICATIONS_BALLOON_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "chrome/browser/extensions/extension_function_dispatcher.h"
 #include "chrome/browser/renderer_host/render_view_host_delegate.h"
 #include "chrome/browser/tab_contents/render_view_host_delegate_helper.h"
+#include "chrome/common/notification_registrar.h"
 
 class Balloon;
 class Browser;
 class Profile;
 class SiteInstance;
 struct RendererPreferences;
 struct WebPreferences;
 
 class BalloonHost : public RenderViewHostDelegate,
                     public RenderViewHostDelegate::View,
-                    public ExtensionFunctionDispatcher::Delegate {
+                    public ExtensionFunctionDispatcher::Delegate,
+                    public NotificationObserver {
  public:
   explicit BalloonHost(Balloon* balloon);
 
   // Initialize the view.
   void Init();
 
   // Stops showing the balloon.
   void Shutdown();
 
   // ExtensionFunctionDispatcher::Delegate overrides.
@@ skipping 16 matching lines @@
   virtual void RenderViewGone(RenderViewHost* render_view_host,
                               base::TerminationStatus status,
                               int error_code);
   virtual void UpdateTitle(RenderViewHost* render_view_host,
                            int32 page_id, const std::wstring& title) {}
   virtual int GetBrowserWindowID() const;
   virtual ViewType::Type GetRenderViewType() const;
   virtual RenderViewHostDelegate::View* GetViewDelegate();
   virtual void ProcessDOMUIMessage(const ViewHostMsg_DomMessage_Params& params);
 
+  // NotificationObserver override.
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
+
   // RenderViewHostDelegate::View methods. Only the ones for opening new
   // windows are currently implemented.
   virtual void CreateNewWindow(
       int route_id,
       WindowContainerType window_container_type,
       const string16& frame_name);
   virtual void CreateNewWidget(int route_id, WebKit::WebPopupType popup_type) {}
   virtual void CreateNewFullscreenWidget(
       int route_id, WebKit::WebPopupType popup_type) {}
   virtual void ShowCreatedWindow(int route_id,
@@ skipping 33 matching lines @@
   virtual void UpdatePreferredSize(const gfx::Size& pref_size);
   virtual RendererPreferences GetRendererPrefs(Profile* profile) const;
 
   // Enable DOM UI. This has to be called before renderer is created.
   void EnableDOMUI();
 
   virtual void UpdateInspectorSetting(const std::string& key,
                                       const std::string& value);
   virtual void ClearInspectorSettings();
 
-  // Called when the render view has painted.
-  void RenderWidgetHostDidPaint();
-
  protected:
   virtual ~BalloonHost();
   // Must override in platform specific implementations.
   virtual void InitRenderWidgetHostView() = 0;
   virtual RenderWidgetHostView* render_widget_host_view() const = 0;
 
   // Owned pointer to the host for the renderer process.
   RenderViewHost* render_view_host_;
 
  private:
@@ skipping 17 matching lines @@
 
   // Common implementations of some RenderViewHostDelegate::View methods.
   RenderViewHostDelegateViewHelper delegate_view_helper_;
 
   // Handles requests to extension APIs. Will only be non-NULL if we are
   // rendering a page from an extension.
   scoped_ptr<ExtensionFunctionDispatcher> extension_function_dispatcher_;
 
   // A flag to enable DOM UI.
   bool enable_dom_ui_;
+
+  NotificationRegistrar registrar_;
 };
 
 #endif  // CHROME_BROWSER_NOTIFICATIONS_BALLOON_HOST_H_