Use a background for the main search box in the experimental app list.

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(0xFB, 0xFB, 0xFB);
 const SkColor kContentsSwitcherBackgroundColor = SK_ColorWHITE;
@@ skipping 14 matching lines @@
 const SkColor kPagerSelectedColor = SkColorSetRGB(0x46, 0x8F, 0xFC);
 
 const SkColor kResultBorderColor = SkColorSetRGB(0xE5, 0xE5, 0xE5);
 const SkColor kResultDefaultTextColor = SkColorSetRGB(0x33, 0x33, 0x33);
 const SkColor kResultDimmedTextColor = SkColorSetRGB(0x96, 0x96, 0x96);
 const SkColor kResultURLTextColor = SkColorSetRGB(0x00, 0x99, 0x33);
 
 const SkColor kGridTitleColor = SkColorSetRGB(0x5A, 0x5A, 0x5A);
 const SkColor kGridTitleHoverColor = SkColorSetRGB(0x3C, 0x3C, 0x3C);
 
-// Color of the borders used in the experimental app list start page.
-const SkColor kStartPageBorderColor = SkColorSetRGB(0xEE, 0xEE, 0xEE);
-
 // Color of the folder ink bubble.
 const SkColor kFolderBubbleColor = SkColorSetRGB(0xD7, 0xD7, 0xD7);
 
 // Duration in milliseconds for page transition.
 const int kPageTransitionDurationInMs = 180;
 
 // Duration in milliseconds for over scroll page transition.
 const int kOverscrollPageTransitionDurationMs = 50;
 
 // Duration in milliseconds for fading in the target page when opening
@@ skipping 49 matching lines @@
 
 #if defined(OS_LINUX)
 #if defined(GOOGLE_CHROME_BUILD)
 const char kAppListWMClass[] = "chrome_app_list";
 #else  // CHROMIUM_BUILD
 const char kAppListWMClass[] = "chromium_app_list";
 #endif
 #endif
 
 }  // namespace app_list