alternate ntp: implement searchbox api for instant overlay to adopt themes

chrome/renderer/searchbox/searchbox.h

 // 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.
 
 #ifndef CHROME_RENDERER_SEARCHBOX_SEARCHBOX_H_
 #define CHROME_RENDERER_SEARCHBOX_SEARCHBOX_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 30 matching lines @@
   size_t selection_start() const { return selection_start_; }
   size_t selection_end() const { return selection_end_; }
   int results_base() const { return results_base_; }
   bool active_tab_is_ntp() const { return active_tab_is_ntp_; }
 
   gfx::Rect GetRect();
   const std::vector<InstantAutocompleteResult>& GetAutocompleteResults();
   // Searchbox retains ownership of this object.
   const InstantAutocompleteResult*
       GetAutocompleteResultWithId(size_t restricted_id) const;
+  const ThemeBackgroundInfo& GetThemeBackgroundInfo();
+  int GetThemeAreaHeight();
 
  private:
   // RenderViewObserver implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   void OnChange(const string16& query,
                 bool verbatim,
                 size_t selection_start,
                 size_t selection_end);
   void OnSubmit(const string16& query);
   void OnCancel(const string16& query);
   void OnResize(const gfx::Rect& bounds);
   void OnDetermineIfPageSupportsInstant();
   void OnAutocompleteResults(
       const std::vector<InstantAutocompleteResult>& results);
   void OnUpOrDownKeyPressed(int count);
   void OnFocus();
   void OnBlur();
   void OnActiveTabModeChanged(bool active_tab_is_ntp);
+  void OnThemeChanged(const ThemeBackgroundInfo& theme_info);
+  void OnThemeAreaHeightChanged(int height);
 
   // Sets the searchbox values to their initial value.
   void Reset();
 
   string16 query_;
   bool verbatim_;
   size_t selection_start_;
   size_t selection_end_;
   size_t results_base_;
   gfx::Rect rect_;
   std::vector<InstantAutocompleteResult> autocomplete_results_;
   size_t last_results_base_;
   std::vector<InstantAutocompleteResult> last_autocomplete_results_;
   bool active_tab_is_ntp_;
+  ThemeBackgroundInfo theme_info_;
+  int theme_area_height_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchBox);
 };
 
 #endif  // CHROME_RENDERER_SEARCHBOX_SEARCHBOX_H_