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

content/public/browser/host_zoom_map.h

Index: content/public/browser/host_zoom_map.h
diff --git a/content/public/browser/host_zoom_map.h b/content/public/browser/host_zoom_map.h
index 930769721106ec55a76d22f33a5682f68a1cdb3c..debbd41ac9c66ea8b6ee082c52caa0a76055c19c 100644
--- a/content/public/browser/host_zoom_map.h
+++ b/content/public/browser/host_zoom_map.h
@@ -92,13 +92,28 @@ class HostZoomMap {
                                             const std::string& host,
                                             double level) = 0;
 
+  // Sets the temporary zoom level that's only valid for the lifetime of this
+  // WebContents.
+  //
+  // This should only be called on the UI thread.
+  virtual void SetTemporaryZoomLevel(int render_process_id,
+                                     int render_view_id,
+                                     const std::string& host,
+                                     double level);
+
+  // Erases the temporary zoom level stored for this WebContents.
+  //
+  // This should only be called on the UI thread.
+  virtual void EraseTemporaryZoomLevel(int render_process_id,
+                                       int render_view_id);
+
   // Get/Set the default zoom level for pages that don't override it.
   virtual double GetDefaultZoomLevel() const = 0;
   virtual void SetDefaultZoomLevel(double level) = 0;;
 
   typedef base::Callback<void(const ZoomLevelChange&)> ZoomLevelChangedCallback;
   typedef base::CallbackList<void(const ZoomLevelChange&)>::Subscription
-      Subscription;
+  Subscription;

[jam, 2014/05/01 23:21:13]

nit: leave as is

   // Add and remove zoom level changed callbacks.
   virtual scoped_ptr<Subscription> AddZoomLevelChangedCallback(
       const ZoomLevelChangedCallback& callback) = 0;