Remove page IDs from three WebContentsObserver APIs that don't need it.

content/browser/renderer_host/render_view_host_delegate.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_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 128 matching lines @@
   // |progress| is a value between 0 (nothing loaded) to 1.0 (top frame
   // entirely loaded).
   virtual void DidChangeLoadProgress(double progress) {}
 
   // The RenderView's main frame document element is ready. This happens when
   // the document has finished parsing.
   virtual void DocumentAvailableInMainFrame(RenderViewHost* render_view_host) {}
 
   // The onload handler in the RenderView's main frame has completed.
   virtual void DocumentOnLoadCompletedInMainFrame(
-      RenderViewHost* render_view_host,
-      int32 page_id) {}
+      RenderViewHost* render_view_host) {}
 
   // The page wants to close the active view in this tab.
   virtual void RouteCloseEvent(RenderViewHost* rvh) {}
 
   // The page wants to post a message to the active view in this tab.
   virtual void RouteMessageEvent(
       RenderViewHost* rvh,
       const ViewMsg_PostMessage_Params& params) {}
 
   // Return a dummy RendererPreferences object that will be used by the renderer
@@ skipping 152 matching lines @@
   virtual void AccessibilityEventReceived(
       const std::vector<AXEventNotificationDetails>& details) {}
 
  protected:
   virtual ~RenderViewHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_