Browser plugin: Implement loadStart and loadAbort events

content/browser/browser_plugin/browser_plugin_guest.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.
 
 // A BrowserPluginGuest represents the browser side of browser <--> renderer
 // communication. A BrowserPlugin (a WebPlugin) is on the renderer side of
 // browser <--> guest renderer communication. The 'guest' renderer is a
 // <browser> tag.
 //
 // BrowserPluginGuest lives on the UI thread of the browser process. It has a
@@ skipping 64 matching lines @@
   void set_guest_hang_timeout_for_testing(const base::TimeDelta& timeout) {
     guest_hang_timeout_ = timeout;
   }
 
   void set_embedder_render_process_host(
       RenderProcessHost* render_process_host) {
     embedder_render_process_host_ = render_process_host;
   }
 
   // WebContentsObserver implementation.
+  virtual void DidStartProvisionalLoadForFrame(
+      int64 frame_id,
+      bool is_main_frame,
+      const GURL& validated_url,
+      bool is_error_page,
+      RenderViewHost* render_view_host);
+
   virtual void DidCommitProvisionalLoadForFrame(
       int64 frame_id,
       bool is_main_frame,
       const GURL& url,
       PageTransition transition_type,
       RenderViewHost* render_view_host) OVERRIDE;
   virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
 
   // WebContentsDelegate implementation.
   virtual void RendererUnresponsive(WebContents* source) OVERRIDE;
@@ skipping 85 matching lines @@
   IDMap<RenderViewHost> pending_updates_;
   int pending_update_counter_;
   base::TimeDelta guest_hang_timeout_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginGuest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_GUEST_H_