Moved theme related state from BrowserInstantController to InstantService.

chrome/browser/ui/search/search_tab_helper.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_SEARCH_SEARCH_TAB_HELPER_H_
 #define CHROME_BROWSER_UI_SEARCH_SEARCH_TAB_HELPER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 32 matching lines @@
   // affect the search mode. This is used by Instant when it "fixes up" the
   // virtual URL of the active entry. Regular navigations are captured through
   // the notification system and shouldn't call this method.
   void NavigationEntryUpdated();
 
   // Updates |last_known_most_visited_items_| with |items|.
   // Returns false if |items| matches the |last_known_most_visited_items_|.
   bool UpdateLastKnownMostVisitedItems(
       const std::vector<InstantMostVisitedItem>& items);
 
+  // Updates |last_known_theme_info_| with |theme_info|.
+  // Returns false if |theme_info| matches the |last_known_theme_info_|.
+  bool UpdateLastKnownThemeBackgroundInfo(
+      const ThemeBackgroundInfo& theme_info);
+
  private:
   friend class content::WebContentsUserData<SearchTabHelper>;
 
   explicit SearchTabHelper(content::WebContents* web_contents);
 
   // Overridden from content::NotificationObserver:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
@@ skipping 19 matching lines @@
   SearchModel model_;
 
   content::NotificationRegistrar registrar_;
 
   content::WebContents* web_contents_;
 
   // Tracks the last set of most visited items sent to the InstantPage renderer.
   // Used to prevent sending duplicate IPC messages to the renderer.
   std::vector<InstantMostVisitedItem> last_known_most_visited_items_;
 
+  // Tracks the last known theme background details.
+  ThemeBackgroundInfo last_known_theme_info_;
+
   DISALLOW_COPY_AND_ASSIGN(SearchTabHelper);
 };
 
 #endif  // CHROME_BROWSER_UI_SEARCH_SEARCH_TAB_HELPER_H_