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

content/public/browser/render_view_host.h

Index: content/public/browser/render_view_host.h
===================================================================
--- content/public/browser/render_view_host.h	(revision 286686)
+++ content/public/browser/render_view_host.h	(working copy)
@@ -194,14 +194,9 @@
   // RenderViewHostDelegate.
   virtual void SyncRendererPrefs() = 0;
 
-  // Returns the current WebKit preferences. Note: WebPreferences is cached, so
-  // this lookup will be fast
+  // Returns the current WebKit preferences.
   virtual WebPreferences GetWebkitPreferences() = 0;
 
-  // If any state that affects the webkit preferences changed, this method must
-  // be called. This triggers recomputing preferences.
-  virtual void OnWebkitPreferencesChanged() = 0;
-
   // Passes a list of Webkit preferences to the renderer.
   virtual void UpdateWebkitPreferences(const WebPreferences& prefs) = 0;