Revert 284592 "Cache the current WebPreferences on RenderViewHos..."

content/browser/renderer_host/render_view_host_impl.h

Index: content/browser/renderer_host/render_view_host_impl.h
===================================================================
--- content/browser/renderer_host/render_view_host_impl.h	(revision 286686)
+++ content/browser/renderer_host/render_view_host_impl.h	(working copy)
@@ -204,7 +204,6 @@
   virtual WebPreferences GetWebkitPreferences() OVERRIDE;
   virtual void UpdateWebkitPreferences(
       const WebPreferences& prefs) OVERRIDE;
-  virtual void OnWebkitPreferencesChanged() OVERRIDE;
   virtual void GetAudioOutputControllers(
       const GetAudioOutputControllersCallback& callback) const OVERRIDE;
   virtual void SelectWordAroundCaret() OVERRIDE;
@@ -242,7 +241,7 @@
   }
 
   // Returns the content specific prefs for this RenderViewHost.
-  WebPreferences ComputeWebkitPrefs(const GURL& url);
+  WebPreferences GetWebkitPrefs(const GURL& url);
 
   // Sends the given navigation message. Use this rather than sending it
   // yourself since this does the internal bookkeeping described below. This
@@ -608,11 +607,6 @@
   // True if the current focused element is editable.
   bool is_focused_element_editable_;
 
-  // This is updated every time UpdateWebkitPreferences is called. That method
-  // is in turn called when any of the settings change that the WebPreferences
-  // values depend on.
-  scoped_ptr<WebPreferences> web_preferences_;
-
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostImpl);
 };