Move LoadProgressTracker to the browser process.

content/browser/frame_host/navigator_delegate.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_DELEGATE_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_DELEGATE_H_
 
 #include "base/strings/string16.h"
 #include "content/public/browser/invalidate_type.h"
 #include "content/public/browser/navigation_controller.h"
@@ skipping 77 matching lines @@
   virtual void AboutToNavigateRenderFrame(
       RenderFrameHostImpl* render_frame_host) {}
 
   // Notifies the Navigator embedder that a navigation to pending
   // NavigationEntry has started in the browser process.
   virtual void DidStartNavigationToPendingEntry(
       RenderFrameHostImpl* render_frame_host,
       const GURL& url,
       NavigationController::ReloadType reload_type) {}
 
+  // The RenderFrame began loading a new page. This corresponds to Blink's
+  // notion of the throbber starting.
+  // |to_different_document| will be true unless the load is a fragment
+  // navigation, or triggered by history.pushState/replaceState.
+  virtual void DidStartLoading(RenderFrameHostImpl* render_frame_host,
+                               bool to_different_document) {}
+
+  // The RenderFrame stopped loading a page. This corresponds to Blink's notion
+  // of the throbber stopping.
+  virtual void DidStopLoading(RenderFrameHostImpl* render_frame_host) {}
+
+  // The page made progress loading.

[nasko, 2014/05/02 22:48:23]

nit: Why break up the line in the middle, it has lots more space to fit text
from below.

[Avi (use Gerrit), 2014/05/05 15:15:02]

Done.

+  // |progress| is a value between 0 (nothing loaded) to 1.0 (page entirely
+  // loaded).
+  virtual void DidChangeLoadProgress(double progress) {}
+
   // Opens a URL with the given parameters. See PageNavigator::OpenURL, which
   // this forwards to.
   virtual void RequestOpenURL(RenderFrameHostImpl* render_frame_host,
                               const OpenURLParams& params) {}
 
   // Returns whether URLs for aborted browser-initiated navigations should be
   // preserved in the omnibox.  Defaults to false.
   virtual bool ShouldPreserveAbortedURLs();
 };
 
 }  // namspace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_DELEGATE_H_