Add chrome-search: access from Instant overlay

chrome/renderer/searchbox/searchbox_extension.cc

 // Copyright 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 "chrome/renderer/searchbox/searchbox_extension.h"
 
 #include "base/i18n/rtl.h"
 #include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/renderer/searchbox/searchbox.h"
 #include "content/public/renderer/render_view.h"
 #include "grit/renderer_resources.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebURLRequest.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebScriptSource.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/window_open_disposition.h"
 #include "v8/include/v8.h"
 
 namespace {
 
-const char kCSSBackgroundImageFormat[] =
-    "-webkit-image-set(url(chrome://theme/IDR_THEME_BACKGROUND?%s) 1x)";
+const char kCSSBackgroundImageFormat[] = "-webkit-image-set("
+    "url(chrome-search://theme/IDR_THEME_NTP_BACKGROUND?%s) 1x)";
 
 const char kCSSBackgroundColorFormat[] = "rgba(%d,%d,%d,%s)";
 
 const char kCSSBackgroundPositionCenter[] = "center";
 const char kCSSBackgroundPositionLeft[] = "left";
 const char kCSSBackgroundPositionTop[] = "top";
 const char kCSSBackgroundPositionRight[] = "right";
 const char kCSSBackgroundPositionBottom[] = "bottom";
 
 const char kCSSBackgroundRepeatNo[] = "no-repeat";
@@ skipping 1029 matching lines @@
 void SearchBoxExtension::DispatchThemeChange(WebKit::WebFrame* frame) {
   Dispatch(frame, kDispatchThemeChangeEventScript);
 }
 
 // static
 void SearchBoxExtension::DispatchMostVisitedChanged(
     WebKit::WebFrame* frame) {
   Dispatch(frame, kDispatchMostVisitedChangedScript);
 }
 }  // namespace extensions_v8