Changes to content/ to facilitate new zoom extension API (work in progress)

content/browser/host_zoom_map_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_BROWSER_HOST_ZOOM_MAP_IMPL_H_
 #define CONTENT_BROWSER_HOST_ZOOM_MAP_IMPL_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 23 matching lines @@
       const std::string& scheme,
       const std::string& host) const OVERRIDE;
   virtual ZoomLevelVector GetAllZoomLevels() const OVERRIDE;
   virtual void SetZoomLevelForHost(
       const std::string& host,
       double level) OVERRIDE;
   virtual void SetZoomLevelForHostAndScheme(
       const std::string& scheme,
       const std::string& host,
       double level) OVERRIDE;
+  virtual void SetTemporaryZoomLevel(int render_process_id,
+                                     int render_view_id,
+                                     const std::string& host,
+                                     double level) OVERRIDE;
+  virtual void EraseTemporaryZoomLevel(int render_process_id,
+                                       int render_view_id) OVERRIDE;
   virtual double GetDefaultZoomLevel() const OVERRIDE;
   virtual void SetDefaultZoomLevel(double level) OVERRIDE;
   virtual scoped_ptr<Subscription> AddZoomLevelChangedCallback(
       const ZoomLevelChangedCallback& callback) OVERRIDE;
 
   // Returns the temporary zoom level that's only valid for the lifetime of
   // the given WebContents (i.e. isn't saved and doesn't affect other
   // WebContentses) if it exists, the default zoom level otherwise.
   //
   // This may be called on any thread.
   double GetTemporaryZoomLevel(int render_process_id,
                                int render_view_id) const;
 
-  // Sets the temporary zoom level that's only valid for the lifetime of this
-  // WebContents.
-  //
-  // This should only be called on the UI thread.
-  void SetTemporaryZoomLevel(int render_process_id,
-                             int render_view_id,
-                             double level);
-
   // NotificationObserver implementation.
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details) OVERRIDE;
 
- private:
+private:
   double GetZoomLevelForHost(const std::string& host) const;
 
+  // Notifies the renderers from this browser context to change the zoom level
+  // for the specified host and scheme.
+  void SendZoomLevelChange(const std::string& scheme,
+                           const std::string& host,
+                           double level);
+
   typedef std::map<std::string, double> HostZoomLevels;
   typedef std::map<std::string, HostZoomLevels> SchemeHostZoomLevels;
 
   // Callbacks called when zoom level changes.
   base::CallbackList<void(const ZoomLevelChange&)>
       zoom_level_changed_callbacks_;
 
   // Copy of the pref data, so that we can read it on the IO thread.
   HostZoomLevels host_zoom_levels_;
   SchemeHostZoomLevels scheme_host_zoom_levels_;
@@ skipping 14 matching lines @@
   mutable base::Lock lock_;
 
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(HostZoomMapImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_HOST_ZOOM_MAP_IMPL_H_