Implement High Contrast mode for Chrome OS

ash/test/test_shell_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 "ash/test/test_shell_delegate.h"
 
 #include <algorithm>
 
 #include "ash/screenshot_delegate.h"
 #include "ash/shell.h"
@@ skipping 52 matching lines @@
 void TestShellDelegate::ShowKeyboardOverlay(ui::AcceleratorTarget* target) {
 }
 
 content::BrowserContext* TestShellDelegate::GetCurrentBrowserContext() {
   return new TestBrowserContext();
 }
 
 void TestShellDelegate::ToggleSpokenFeedback() {
 }
 
+bool TestShellDelegate::IsHighContrastEnabled() {
+}
+
 app_list::AppListViewDelegate* TestShellDelegate::CreateAppListViewDelegate() {
   return NULL;
 }
 
 void TestShellDelegate::StartPartialScreenshot(
     ScreenshotDelegate* screenshot_delegate) {
   if (screenshot_delegate)
     screenshot_delegate->HandleTakePartialScreenshot(NULL, gfx::Rect());
 }
 
 LauncherDelegate* TestShellDelegate::CreateLauncherDelegate(
     ash::LauncherModel* model) {
   return new TestLauncherDelegate(model);
 }
 
 SystemTrayDelegate* TestShellDelegate::CreateSystemTrayDelegate(
     SystemTray* tray) {
   return NULL;
 }
 
 UserWallpaperDelegate* TestShellDelegate::CreateUserWallpaperDelegate() {
   return NULL;
 }
 
 }  // namespace test
 }  // namespace ash