Remember zoom on a per-host basis....

chrome/renderer/render_thread.h

 // Copyright (c) 2009 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_THREAD_H_
 #define CHROME_RENDERER_RENDER_THREAD_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 136 matching lines @@
   void SetCacheMode(bool enabled);
 
  private:
   virtual void OnControlMessageReceived(const IPC::Message& msg);
 
   void Init();
 
   void OnUpdateVisitedLinks(base::SharedMemoryHandle table);
   void OnAddVisitedLinks(const VisitedLinkSlave::Fingerprints& fingerprints);
   void OnResetVisitedLinks();
-
+  void OnSetZoomLevelForCurrentHost(const std::string& host, int zoom_level);
   void OnUpdateUserScripts(base::SharedMemoryHandle table);
   void OnSetExtensionFunctionNames(const std::vector<std::string>& names);
   void OnPageActionsUpdated(const std::string& extension_id,
       const std::vector<std::string>& page_actions);
   void OnDOMStorageEvent(const ViewMsg_DOMStorageEvent_Params& params);
   void OnExtensionSetAPIPermissions(
       const std::string& extension_id,
       const std::vector<std::string>& permissions);
   void OnExtensionSetHostPermissions(
       const GURL& extension_url,
@@ skipping 77 matching lines @@
   // The count of hidden RenderWidgets running through this thread.
   int hidden_widget_count_;
 
   // The current value of the idle notification timer delay.
   double idle_notification_delay_in_s_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThread);
 };
 
 #endif  // CHROME_RENDERER_RENDER_THREAD_H_