app_list: Paint background for app item title.

ui/app_list/app_list_constants.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 "content/public/browser/browser_main_parts.h"
+#include "ui/app_list/app_list_constants.h"
 
-namespace content {
+namespace app_list {
 
-int BrowserMainParts::PreCreateThreads() {
-  return 0;
-}
+const SkColor kContentsBackgroundColor = SkColorSetRGB(0xF5, 0xF5, 0xF5);
 
-bool BrowserMainParts::MainMessageLoopRun(int* result_code) {
-  return false;
-}
-
-}  // namespace content
+}  // namespace app_list