Update app list background color.

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 "ui/app_list/app_list_constants.h"
 
 namespace app_list {
 
-const SkColor kContentsBackgroundColor = SkColorSetRGB(0xF5, 0xF5, 0xF5);
+const SkColor kContentsBackgroundColor = SkColorSetRGB(0xF2, 0xF2, 0xF2);
 const SkColor kSearchBoxBackground = SK_ColorWHITE;
 
 // In Windows, transparent background color will cause ugly text rendering,
 // therefore kContentsBackgroundColor should be used. See crbug.com/406989
 #if defined(OS_CHROMEOS)
 const SkColor kLabelBackgroundColor = SK_ColorTRANSPARENT;
 #else
 const SkColor kLabelBackgroundColor = kContentsBackgroundColor;
 #endif
 
@@ skipping 119 matching lines @@
     case 2:
       return gfx::ShadowValue(gfx::Point(0, 2), 4,
                               SkColorSetARGB(0x33, 0, 0, 0));
     default:
       return gfx::ShadowValue(gfx::Point(0, 8), 12,
                               SkColorSetARGB(0x3F, 0, 0, 0));
   }
 }
 
 }  // namespace app_list