Moved theme related state from BrowserInstantController to InstantService.

chrome/renderer/searchbox/searchbox.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.h"
 
 #include <string>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
@@ skipping 430 matching lines @@
       }
     }
   }
 }
 
 void SearchBox::OnSetDisplayInstantResults(bool display_instant_results) {
   display_instant_results_ = display_instant_results;
 }
 
 void SearchBox::OnThemeChanged(const ThemeBackgroundInfo& theme_info) {
+  // Do not send duplicate notifications.
+  if (theme_info_ == theme_info)
+    return;
+
   theme_info_ = theme_info;
   if (render_view()->GetWebView() && render_view()->GetWebView()->mainFrame()) {
     extensions_v8::SearchBoxExtension::DispatchThemeChange(
         render_view()->GetWebView()->mainFrame());
   }
 }
 
 void SearchBox::OnFontInformationReceived(const string16& omnibox_font,
                                           size_t omnibox_font_size) {
   omnibox_font_ = omnibox_font;
@@ skipping 59 matching lines @@
   InstantMostVisitedItem item;
   return GetMostVisitedItemWithID(item_id, &item) ? item.url : GURL();
 }
 
 void SearchBox::OnToggleVoiceSearch() {
   if (render_view()->GetWebView() && render_view()->GetWebView()->mainFrame()) {
     extensions_v8::SearchBoxExtension::DispatchToggleVoiceSearch(
         render_view()->GetWebView()->mainFrame());
   }
 }