Original patch from issue 570048

chrome/renderer/render_view.h

Index: chrome/renderer/render_view.h
diff --git a/chrome/renderer/render_view.h b/chrome/renderer/render_view.h
index 4ffaea92d4bbaa04fcab6c486557422441b1a12d..ea791115519fb2f79b9162ec337fdc16910dbe21 100644
--- a/chrome/renderer/render_view.h
+++ b/chrome/renderer/render_view.h
@@ -938,7 +938,7 @@ class RenderView : public RenderWidget,
 #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();
@@ -963,6 +963,9 @@ class RenderView : public RenderWidget,
 
   // 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);
@@ -1102,6 +1105,9 @@ class RenderView : public RenderWidget,
   // 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();
 
@@ -1122,9 +1128,6 @@ class RenderView : public RenderWidget,
   // 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.