Switch ContentSettingsObserver to be a RenderFrameObserver instead of a RenderViewObserver

content/public/renderer/render_frame_observer.h

Index: content/public/renderer/render_frame_observer.h
===================================================================
--- content/public/renderer/render_frame_observer.h	(revision 240912)
+++ content/public/renderer/render_frame_observer.h	(working copy)
@@ -11,6 +11,10 @@
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 
+namespace blink {
+class WebFrame;
+}
+
 namespace content {
 
 class RendererPpapiHost;
@@ -29,6 +33,17 @@
   // Called when a Pepper plugin is created.
   virtual void DidCreatePepperPlugin(RendererPpapiHost* host) {}
 
+  // Called when the WebFrame associated with the RenderFrame is created.
+  // When switches::kSitePerProcess is the default, there will be one
+  // RenderFrame per blink::WebFrame. If it's not set though, a RenderFrame can
+  // be used for more than one blink::WebFrame. In that case, this can be called
+  // more than once.
+  virtual void WebFrameCreated(blink::WebFrame* frame) {}
+
+  // These match the Blink API notifications
+  virtual void DidCommitProvisionalLoad(blink::WebFrame* frame,
+                                        bool is_new_navigation) {}
+
   // IPC::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;