re-use WebUIs

content/browser/webui/web_ui_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_WEBUI_WEB_UI_IMPL_H_
 #define CONTENT_BROWSER_WEBUI_WEB_UI_IMPL_H_
 #pragma once
 
 #include <map>
-#include <set>
 
 #include "base/compiler_specific.h"
+#include "base/memory/weak_ptr.h"
 #include "content/public/browser/web_ui.h"
 #include "ipc/ipc_channel.h"
 
 namespace content {
 class RenderViewHost;
 }
 
 class CONTENT_EXPORT WebUIImpl : public content::WebUI,
-                                 public IPC::Channel::Listener {
+                                 public IPC::Channel::Listener,
+                                 public base::SupportsWeakPtr<WebUIImpl> {
  public:
   explicit WebUIImpl(content::WebContents* contents);
   virtual ~WebUIImpl();
 
   // Called by WebContentsImpl when the RenderView is first created. This is
   // *not* called for every page load because in some cases
   // RenderViewHostManager will reuse RenderView instances.
   void RenderViewCreated(content::RenderViewHost* render_view_host);
 
-  // Called when the document element is available for the page. |main_frame|
-  // is true if the main frame's document is the one that's ready; otherwise
-  // the frame is an iframe and |source_url| gives its URL. The WebUI ignores
-  // messages until the document is available, because otherwise when we reuse
-  // a RenderView, we can receive and attempt to handle WebUISend messages from
-  // the prior navigation, which were in-flight when the RenderView got
-  // repurposed.
-  void DocumentAvailableInFrame(const GURL& source_url);
-
   // WebUI implementation:
   virtual content::WebContents* GetWebContents() const OVERRIDE;
   virtual content::WebUIController* GetController() const OVERRIDE;
   virtual void SetController(content::WebUIController* controller) OVERRIDE;
   virtual bool ShouldHideFavicon() const OVERRIDE;
   virtual void HideFavicon() OVERRIDE;
   virtual bool ShouldFocusLocationBarByDefault() const OVERRIDE;
   virtual void FocusLocationBarByDefault() OVERRIDE;
   virtual bool ShouldHideURL() const OVERRIDE;
   virtual void HideURL() OVERRIDE;
@@ skipping 62 matching lines @@
   // The WebUIMessageHandlers we own.
   std::vector<content::WebUIMessageHandler*> handlers_;
 
   // Non-owning pointer to the WebContents this WebUI is associated with.
   content::WebContents* web_contents_;
 
   // The path for the iframe this WebUI is embedded in (empty if not in an
   // iframe).
   std::string frame_xpath_;
 
-  // List of URL origins in the renderer for which the document is ready. Each
-  // origin identifies a frame; two frames with the same origin may cause this
-  // to break.
-  std::set<GURL> document_available_origins_;
-
   scoped_ptr<content::WebUIController> controller_;
 
   DISALLOW_COPY_AND_ASSIGN(WebUIImpl);
 };
 
 #endif  // CONTENT_BROWSER_WEBUI_WEB_UI_IMPL_H_