Make command-zero reset page scale in addition to zoom level

content/renderer/render_view_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_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 661 matching lines @@
   void OnSetPageEncoding(const std::string& encoding_name);
   void OnSetRendererPrefs(const RendererPreferences& renderer_prefs);
   void OnSetWebUIProperty(const std::string& name, const std::string& value);
   void OnSetZoomLevelForLoadingURL(const GURL& url, double zoom_level);
   void OnSetZoomLevelForView(bool uses_temporary_zoom_level, double level);
   void OnStopFinding(StopFindAction action);
   void OnSuppressDialogsUntilSwapOut();
   void OnThemeChanged();
   void OnUpdateTargetURLAck();
   void OnUpdateWebPreferences(const WebPreferences& prefs);
+  void OnResetPageScale();
   void OnZoom(PageZoom zoom);
   void OnEnableViewSourceMode();
   void OnWindowSnapshotCompleted(const int snapshot_id,
       const gfx::Size& size, const std::vector<unsigned char>& png);
   void OnForceRedraw(int request_id);
   void OnSelectWordAroundCaret();
 #if defined(OS_ANDROID)
   void OnActivateNearestFindResult(int request_id, float x, float y);
   void OnFindMatchRects(int current_version);
   void OnUndoScrollFocusedEditableNodeIntoRect();
@@ skipping 355 matching lines @@
   // use the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_