Fix the full screen switching browser window dipping below launcher bar issue.

ui/aura/root_window.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/root_window.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 260 matching lines @@
     if (status == ui::GESTURE_STATUS_CONSUMED) {
       gesture_handler_ = GestureEventHandlerForConsumedGesture(
           translated_event, target);
     }
     return status != ui::GESTURE_STATUS_UNKNOWN;
   }
 
   return false;
 }
 
+void RootWindow::OnScreenWorkAreaInsetsChanged() {
+  FOR_EACH_OBSERVER(RootWindowObserver, observers_,
+                    OnScreenWorkAreaInsetsChanged());
+}
+
 void RootWindow::OnHostResized(const gfx::Size& size) {
   // The compositor should have the same size as the native root window host.
   compositor_->WidgetSizeChanged(size);
 
   // The layer, and all the observers should be notified of the
   // transformed size of the root window.
   gfx::Rect bounds(size);
   layer()->transform().TransformRect(&bounds);
   SetBounds(gfx::Rect(bounds.size()));
   FOR_EACH_OBSERVER(RootWindowObserver, observers_,
@@ skipping 540 matching lines @@
   // is currently broken. See/ crbug.com/107931.
   MouseEvent event(ui::ET_MOUSE_MOVED,
                    orig_mouse_location,
                    orig_mouse_location,
                    0);
   DispatchMouseEvent(&event);
 #endif
 }
 
 }  // namespace aura