Move LoadProgressTracker to the browser process.

content/browser/frame_host/render_frame_host_delegate.h

Index: content/browser/frame_host/render_frame_host_delegate.h
diff --git a/content/browser/frame_host/render_frame_host_delegate.h b/content/browser/frame_host/render_frame_host_delegate.h
index 651ddbc587487d20f35b1b1e92eb8c8cec1b59e4..b4db5d4c9c91cea306c7e13cd2a6590c962313fe 100644
--- a/content/browser/frame_host/render_frame_host_delegate.h
+++ b/content/browser/frame_host/render_frame_host_delegate.h
@@ -52,10 +52,6 @@ class CONTENT_EXPORT RenderFrameHostDelegate {
   virtual void DidStartLoading(RenderFrameHost* render_frame_host,
                                bool to_different_document) {}
 
-  // The top-level RenderFrame stopped loading a page. This corresponds to
-  // Blink's notion of the throbber stopping.
-  virtual void DidStopLoading(RenderFrameHost* render_frame_host) {}
-
   // The RenderFrameHost has been swapped out.
   virtual void SwappedOut(RenderFrameHost* render_frame_host) {}