Move LoadProgressTracker to the browser process.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 774696edeb270ac6ba2ee3bb2252a7b638049a06..a62b7f8cd18f1ac9a9a4f9aa57a18f1fad49ce28 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -297,8 +297,6 @@ bool RenderFrameHostImpl::OnMessageReceived(const IPC::Message &msg) {
                         OnDidFailLoadWithError)
     IPC_MESSAGE_HANDLER_GENERIC(FrameHostMsg_DidCommitProvisionalLoad,
                                 OnNavigate(msg))
-    IPC_MESSAGE_HANDLER(FrameHostMsg_DidStartLoading, OnDidStartLoading)
-    IPC_MESSAGE_HANDLER(FrameHostMsg_DidStopLoading, OnDidStopLoading)
     IPC_MESSAGE_HANDLER(FrameHostMsg_OpenURL, OnOpenURL)
     IPC_MESSAGE_HANDLER(FrameHostMsg_DocumentOnLoadCompleted,
                         OnDocumentOnLoadCompleted)
@@ -535,14 +533,6 @@ void RenderFrameHostImpl::SwapOut(RenderFrameProxyHost* proxy) {
   frame_tree_node_->render_manager()->SwappedOut(this);
 }
 
-void RenderFrameHostImpl::OnDidStartLoading(bool to_different_document) {
-  delegate_->DidStartLoading(this, to_different_document);
-}
-
-void RenderFrameHostImpl::OnDidStopLoading() {
-  delegate_->DidStopLoading(this);
-}
-
 void RenderFrameHostImpl::OnBeforeUnloadACK(
     bool proceed,
     const base::TimeTicks& renderer_before_unload_start_time,