Original patch from issue 570048

chrome/renderer/render_view.h

 // Copyright (c) 2011 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_RENDERER_RENDER_VIEW_H_
 #define CHROME_RENDERER_RENDER_VIEW_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 920 matching lines @@
   void OnSetDOMUIProperty(const std::string& name, const std::string& value);
   void OnSetEditCommandsForNextKeyEvent(const EditCommands& edit_commands);
   void OnSetInitialFocus(bool reverse);
   void OnScrollFocusedEditableNodeIntoView();
   void OnSetPageEncoding(const std::string& encoding_name);
   void OnSetRendererPrefs(const RendererPreferences& renderer_prefs);
   void OnSetupDevToolsClient();
 #if defined(OS_MACOSX)
   void OnSetWindowVisibility(bool visible);
 #endif
-  void OnSetZoomLevel(double zoom_level);
+  void OnSetZoomLevel(int request_id, double zoom_level);
   void OnSetZoomLevelForLoadingURL(const GURL& url, double zoom_level);
   void OnShouldClose();
   void OnStop();
   void OnStopFinding(const ViewMsg_StopFinding_Params& params);
   void OnThemeChanged();
   void OnToggleSpellCheck();
   void OnToggleSpellPanel(bool is_currently_visible);
   void OnUndo();
   void OnUpdateBrowserWindowId(int window_id);
   void OnUpdateTargetURLAck();
   void OnUpdateWebPreferences(const WebPreferences& prefs);
 #if defined(OS_MACOSX)
   void OnWindowFrameChanged(const gfx::Rect& window_frame,
                             const gfx::Rect& view_frame);
   void OnSelectPopupMenuItem(int selected_index);
 #endif
   void OnZoom(PageZoom::Function function);
   void OnJavaScriptStressTestControl(int cmd, int param);
 
   // Adding a new message handler? Please add it in alphabetical order above
   // and put it in the same position in the .cc file.
 
   // Misc private functions ----------------------------------------------------
 
+  // Helper to add an error message to the root frame's console.
+  void AddErrorToRootConsole(const string16& message);
+
   // Helper method that returns if the user wants to block content of type
   // |content_type|.
   bool AllowContentType(ContentSettingsType settings_type);
 
   void AltErrorPageFinished(WebKit::WebFrame* frame,
                             const WebKit::WebURLError& original_error,
                             const std::string& html);
 
   // Exposes the DOMAutomationController object that allows JS to send
   // information to the browser process.
@@ skipping 119 matching lines @@
 
   // Common method for OnPrintPages() and OnPrintPreview().
   void OnPrint(bool is_preview);
 
   // Prints |frame|.
   void Print(WebKit::WebFrame* frame, bool script_initiated, bool is_preview);
 
   // Returns the PrintWebViewHelper for this class, creating if necessary.
   PrintWebViewHelper* GetPrintWebViewHelper();
 
+  // Notify the browser of a change to the zoom level.
+  void ReportZoomLevelChanged(int request_id);

[Aaron Boodman, 2011/02/07 09:26:55]

The methods in this class that start with an initial lower-case are
implementations of WebKit interfaces. Since this method is no longer such an
implementation, I renamed it to make it more clear.

+
   // Starts nav_state_sync_timer_ if it isn't already running.
   void StartNavStateSyncTimerIfNecessary();
 
   // Dispatches the current navigation state to the browser. Called on a
   // periodic timer so we don't send too many messages.
   void SyncNavigationState();
 
 #if defined(OS_LINUX)
   void UpdateFontRenderingFromRendererPrefs();
 #else
   void UpdateFontRenderingFromRendererPrefs() {}
 #endif
 
   // Update the target url and tell the browser that the target URL has changed.
   // If |url| is empty, show |fallback_url|.
   void UpdateTargetURL(const GURL& url, const GURL& fallback_url);
 
   // Updates the state of the toggle spell check command in the browser process.
   void UpdateToggleSpellCheckCommandState();
 
-  // Helper to add an error message to the root frame's console.
-  void AddErrorToRootConsole(const string16& message);
-
   // ---------------------------------------------------------------------------
   // ADDING NEW FUNCTIONS? Please keep private functions alphabetized and put
   // it in the same order in the .cc file as it was in the header.
   // ---------------------------------------------------------------------------
 
   // Settings ------------------------------------------------------------------
 
   WebPreferences webkit_preferences_;
   RendererPreferences renderer_preferences_;
 
@@ skipping 338 matching lines @@
   // bunch of stuff, you should probably create a helper class and put your
   // data and methods on that to avoid bloating RenderView more.  You can use
   // the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderView);
 };
 
 #endif  // CHROME_RENDERER_RENDER_VIEW_H_