Aura: Add non-browser windows into the list of "Alt + Tab" cycle list.

ui/aura/test/test_activation_client.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 "ui/aura/test/test_activation_client.h"
 
 #include "ui/aura/client/activation_delegate.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 
@@ skipping 41 matching lines @@
   if (active_windows_.empty())
     return NULL;
   return active_windows_.back();
 }
 
 bool TestActivationClient::OnWillFocusWindow(Window* window,
                                              const Event* event) {
   return true;
 }
 
+bool TestActivationClient::CanActivateWindow(Window* window) const {
+  return true;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // TestActivationClient, WindowObserver implementation:
 
 void TestActivationClient::OnWindowDestroyed(Window* window) {
   if (window == GetActiveWindow()) {
     window->RemoveObserver(this);
     active_windows_.pop_back();
     Window* next_active = GetActiveWindow();
     if (next_active && aura::client::GetActivationDelegate(next_active))
       aura::client::GetActivationDelegate(next_active)->OnActivated();
     return;
   }
 
   RemoveActiveWindow(window);
 }
 
 void TestActivationClient::RemoveActiveWindow(Window* window) {
   for (unsigned int i = 0; i < active_windows_.size(); ++i) {
     if (active_windows_[i] == window) {
       active_windows_.erase(active_windows_.begin() + i);
       window->RemoveObserver(this);
       return;
     }
   }
 }
 
 }  // namespace test
 }  // namespace aura