Preserve page-level focus for subframe cross-process navigations.

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 134 matching lines @@
 
   // Returns true if at least one of the nodes in this FrameTree is loading.
   bool IsLoading();
 
   // Set page-level focus in all SiteInstances involved in rendering
   // this FrameTree, not including the current main frame's
   // SiteInstance. The focus update will be sent via the main frame's proxies
   // in those SiteInstances.
   void ReplicatePageFocus(bool is_focused);
 
+  // Updates page-level focus for this FrameTree in the subframe renderer
+  // identified by |instance|.
+  void SetPageFocus(SiteInstance* instance, bool is_focused);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(RenderFrameHostImplBrowserTest, RemoveFocusedFrame);
   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;
 
@@ skipping 33 matching lines @@
 
   // Overall load progress.
   double load_progress_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameTree);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_FRAME_TREE_H_