InstantExtended: Add js api for custom logo.

chrome/browser/instant/instant_loader_delegate.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_BROWSER_INSTANT_INSTANT_LOADER_DELEGATE_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_LOADER_DELEGATE_H_
 
 #include <vector>
 
 #include "chrome/common/instant_types.h"
@@ skipping 10 matching lines @@
       const std::vector<InstantSuggestion>& suggestions) = 0;
 
   // Commit the preview.
   virtual void CommitInstantLoader(InstantLoader* loader) = 0;
 
   // Resize the preview.
   virtual void SetInstantPreviewHeight(InstantLoader* loader,
                                        int height,
                                        InstantSizeUnits units) = 0;
 
+  // Indicates whether the search provider would like to show a custom logo on
+  // the NTP.
+  virtual void SetHasCustomLogo(InstantLoader* loader, bool has_logo) = 0;
+
   // Notification that the first page load (of the Instant URL) completed.
   virtual void InstantLoaderPreviewLoaded(InstantLoader* loader) = 0;
 
   // Notification when the loader has determined whether or not the page
   // supports the Instant API.
   virtual void InstantSupportDetermined(InstantLoader* loader,
                                         bool supports_instant) = 0;
 
   // Notification that the loader swapped a different TabContents into the
   // preview, usually because a prerendered page was navigated to.
   virtual void SwappedTabContents(InstantLoader* loader) = 0;
 
   // Notification that the preview gained focus, usually due to the user
   // clicking on it.
   virtual void InstantLoaderContentsFocused(InstantLoader* loader) = 0;
 
  protected:
   virtual ~InstantLoaderDelegate() {}
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_LOADER_DELEGATE_H_