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 b1a15236a59fea955f2ce8addd79f5272de6919a..b53341dda6912b1f9776370c122d9030de1ee4fd 100644
--- a/content/browser/frame_host/render_frame_host_delegate.h
+++ b/content/browser/frame_host/render_frame_host_delegate.h
@@ -51,10 +51,6 @@ 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) {}