Adds RenderFrameObserver::DidFinishDocumentLoad

No doubt we can remove RenderViewObserver::DidFinishDocumentLoad(),
but that can be done separately (there is already a TODO for it).

BUG=none
TEST=none
R=darin@chromium.org

Review URL: https://codereview.chromium.org/212793004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@260119 0039d316-1c4b-4281-b951-d872f2087c98

content/public/renderer/render_frame_observer.h

@@ -43,6 +43,7 @@ class CONTENT_EXPORT RenderFrameObserver : public IPC::Listener,
   virtual void DidStartProvisionalLoad() {}
   virtual void DidFailProvisionalLoad(const blink::WebURLError& error) {}
   virtual void DidFinishLoad() {}
+  virtual void DidFinishDocumentLoad() {}
   virtual void WillReleaseScriptContext(v8::Handle<v8::Context> context,
                                         int world_id) {}
   virtual void DidClearWindowObject(int world_id) {}

content/renderer/render_frame_impl.cc

@@ -1776,6 +1776,8 @@ void RenderFrameImpl::didFinishDocumentLoad(blink::WebFrame* frame) {
   // TODO(nasko): Remove once we have RenderFrameObserver for this method.
   render_view_->didFinishDocumentLoad(frame);
 
+  FOR_EACH_OBSERVER(RenderFrameObserver, observers_, DidFinishDocumentLoad());
+
   // Check whether we have new encoding name.
   render_view_->UpdateEncoding(frame, frame->view()->pageEncoding().utf8());
 }