aura: Rename OnWindowVisisbilityChanged() to OnWindowTargetVisibilityChanged().

ui/aura/test/test_window_delegate.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_window_delegate.h"
 
 #include "base/stringprintf.h"
 #include "ui/aura/event.h"
 #include "ui/aura/window.h"
 #include "ui/base/hit_test.h"
@@ skipping 70 matching lines @@
 void TestWindowDelegate::OnDeviceScaleFactorChanged(
     float device_scale_factor) {
 }
 
 void TestWindowDelegate::OnWindowDestroying() {
 }
 
 void TestWindowDelegate::OnWindowDestroyed() {
 }
 
-void TestWindowDelegate::OnWindowVisibilityChanged(bool visible) {
+void TestWindowDelegate::OnWindowTargetVisibilityChanged(bool visible) {
 }
 
 bool TestWindowDelegate::HasHitTestMask() const {
   return false;
 }
 
 void TestWindowDelegate::GetHitTestMask(gfx::Path* mask) const {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ skipping 106 matching lines @@
   std::string result = StringPrintf("%d %d",
                                     key_press_count_,
                                     key_release_count_);
   key_press_count_ = 0;
   key_release_count_ = 0;
   return result;
 }
 
 }  // namespace test
 }  // namespace aura