Move load progress tracking logic to the frame tree.

content/browser/frame_host/frame_tree.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_FRAME_TREE_H_
 #define CONTENT_BROWSER_FRAME_HOST_FRAME_TREE_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 112 matching lines @@
 
   // Keeps track of which RenderFrameHosts are using each RenderViewHost.  When
   // the number drops to zero, we call Shutdown on the RenderViewHost.
   void RegisterRenderFrameHost(RenderFrameHostImpl* render_frame_host);
   void UnregisterRenderFrameHost(RenderFrameHostImpl* render_frame_host);
 
   // This is only meant to be called by FrameTreeNode. Triggers calling
   // the listener installed by SetFrameRemoveListener.
   void FrameRemoved(FrameTreeNode* frame);
 
+  // Returns this FrameTree's total load progress.
+  double GetLoadProgress();
+
+  // Resets the load progress on each node of this FrameTree.

[nasko, 2015/03/24 17:26:11]

nit: s/each node of/all nodes in/.

[Fabrice (no longer in Chrome), 2015/03/25 17:35:01]

Done.

+  void ResetLoadProgress();
+
+  // Returns true if at least one of the nodes in this FrameTree is loading.
+  bool IsLoading();
+
  private:
   typedef base::hash_map<int, RenderViewHostImpl*> RenderViewHostMap;
   typedef std::multimap<int, RenderViewHostImpl*> RenderViewHostMultiMap;
 
   // A variation to the public ForEach method with a difference that the subtree
   // starting at |skip_this_subtree| will not be recursed into.
   void ForEach(const base::Callback<bool(FrameTreeNode*)>& on_node,
                FrameTreeNode* skip_this_subtree) const;
 
   // These delegates are installed into all the RenderViewHosts and
@@ skipping 25 matching lines @@
   int64 focused_frame_tree_node_id_;
 
   base::Callback<void(RenderFrameHost*)> on_frame_removed_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameTree);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_FRAME_TREE_H_