Move LoadProgressTracker to the browser process.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index fea916e68d920a2ffc7b2c26ea8388443caaedcf..219e98b252bf0cf14ba5fed6dddabd74beb203ae 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -3375,13 +3375,13 @@ void WebContentsImpl::RequestMove(const gfx::Rect& new_bounds) {
     delegate_->MoveContents(this, new_bounds);
 }
 
-void WebContentsImpl::DidStartLoading(RenderFrameHost* render_frame_host,
+void WebContentsImpl::DidStartLoading(RenderFrameHostImpl* render_frame_host,
                                       bool to_different_document) {
   SetIsLoading(render_frame_host->GetRenderViewHost(), true,
                to_different_document, NULL);
 }
 
-void WebContentsImpl::DidStopLoading(RenderFrameHost* render_frame_host) {
+void WebContentsImpl::DidStopLoading(RenderFrameHostImpl* render_frame_host) {
   scoped_ptr<LoadNotificationDetails> details;
 
   // Use the last committed entry rather than the active one, in case a