Revert of Add OnDisplayMetricsChanged in DisplayObserver.

ash/wm/overview/window_selector.cc

 // 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.
 
 #include "ash/wm/overview/window_selector.h"
 
 #include <algorithm>
 
 #include "ash/accessibility_delegate.h"
 #include "ash/ash_switches.h"
@@ skipping 307 matching lines @@
 
   // TODO(flackr): StopPropogation prevents generation of gesture events.
   // We should find a better way to prevent events from being delivered to
   // the window, perhaps a transparent window in front of the target window
   // or using EventClientImpl::CanProcessEventsWithinSubtree and then a tap
   // gesture could be used to activate the window.
   event->SetHandled();
   SelectWindow(target);
 }
 
+void WindowSelector::OnDisplayBoundsChanged(const gfx::Display& display) {
+  PositionWindows(/* animate */ false);
+}
+
 void WindowSelector::OnDisplayAdded(const gfx::Display& display) {
 }
 
 void WindowSelector::OnDisplayRemoved(const gfx::Display& display) {
 }
 
-void WindowSelector::OnDisplayMetricsChanged(const gfx::Display& display,
-                                             uint32_t metrics) {
-  PositionWindows(/* animate */ false);
-}
-
 void WindowSelector::OnWindowAdded(aura::Window* new_window) {
   if (new_window->type() != ui::wm::WINDOW_TYPE_NORMAL &&
       new_window->type() != ui::wm::WINDOW_TYPE_PANEL) {
     return;
   }
 
   for (size_t i = 0; i < kSwitchableWindowContainerIdsLength; ++i) {
     if (new_window->parent()->id() == kSwitchableWindowContainerIds[i] &&
         !::wm::GetTransientParent(new_window)) {
       // The new window is in one of the switchable containers, abort overview.
@@ skipping 226 matching lines @@
   for (WindowSelectorItemList::iterator iter = windows_.begin();
        iter != windows_.end(); ++iter) {
     aura::Window* selected = (*iter)->TargetedWindow(window);
     if (selected)
       return selected;
   }
   return NULL;
 }
 
 }  // namespace ash