Do not save and restore View focus on aura::Window focus changes.

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 1984 matching lines @@
   return view_->GetDropData();
 }
 
 void WebContentsImpl::Focus() {
   RenderWidgetHostView* const fullscreen_view =
       GetFullscreenRenderWidgetHostView();
   if (fullscreen_view)
     fullscreen_view->Focus();
   else
     view_->Focus();
+
+  FOR_EACH_OBSERVER(WebContentsObserver, observers_, WasFocused());

[Ben Goodger (Google), 2014/07/30 02:57:26]

So you should be able to trigger this off of the FocusChangeObserver
notification that gets sent via view_->Focus(), rather than adding this new
cross platform notification that's only observed by the views frontend.

[msw, 2014/07/30 03:18:12]

I'll look into this, but the WebView doesn't get Focus()'ed, afaict.

[Ben Goodger (Google), 2014/07/30 15:44:02]

Not the WebView... view_->Focus() sets focus to an aura::Window. It should be
possible to detect that.

 }
 
 void WebContentsImpl::SetInitialFocus() {
   RenderWidgetHostView* const fullscreen_view =
       GetFullscreenRenderWidgetHostView();
   if (fullscreen_view)
     fullscreen_view->Focus();
   else
     view_->SetInitialFocus();
 }
@@ skipping 2120 matching lines @@
   if (new_size != old_size)
     delegate_->UpdatePreferredSize(this, new_size);
 }
 
 void WebContentsImpl::ResumeResponseDeferredAtStart() {
   FrameTreeNode* node = frame_tree_.root();
   node->render_manager()->ResumeResponseDeferredAtStart();
 }
 
 }  // namespace content