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

chrome/browser/instant/instant_controller.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_INSTANT_INSTANT_CONTROLLER_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 11 matching lines @@
 #include "content/public/common/page_transition_types.h"
 #include "googleurl/src/gurl.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/rect.h"
 
 struct AutocompleteMatch;
 class AutocompleteProvider;
 class InstantLoader;
 class TabContents;
 class TemplateURL;
+struct ThemeBackgroundInfo;
 
 namespace chrome {
 class BrowserInstantController;
 }
 
 // InstantController maintains a WebContents that is intended to give a preview
 // of search suggestions and results. InstantController is owned by Browser via
 // BrowserInstantController.
 class InstantController {
  public:
@@ skipping 49 matching lines @@
   // the loader which will notify the renderer.
   void SearchModeChanged(const chrome::search::Mode& old_mode,
                          const chrome::search::Mode& new_mode);
 
   // The user switched tabs. Hide the preview if needed.
   void ActiveTabChanged();
 
   // Sets whether Instant should show result previews.
   void SetInstantEnabled(bool instant_enabled);
 
+  // The theme has changed.  Pass the message down to the loader which will
+  // notify the renderer.
+  void ThemeChanged(const ThemeBackgroundInfo& theme_info);
+
+  // The theme area height has changed.  Pass the message down to the loader
+  // which will notify the renderer.
+  void ThemeAreaHeightChanged(int height);
+
   // Returns the transition type of the last AutocompleteMatch passed to Update.
   content::PageTransition last_transition_type() const {
     return last_transition_type_;
   }
 
   const InstantModel* model() const { return &model_; }
 
   // Invoked by InstantLoader when it has suggested text.
   void SetSuggestions(InstantLoader* loader,
                       const std::vector<InstantSuggestion>& suggestions);
@@ skipping 129 matching lines @@
 
   // The timestamp at which query editing began. This value is used when the
   // first set of suggestions is processed and cleared when the overlay is
   // hidden.
   base::Time first_interaction_time_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantController);
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_H_