[Android WebView] Add an API to control favicon loading.

android_webview/native/aw_contents.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 ANDROID_WEBVIEW_NATIVE_AW_CONTENTS_H_
 #define ANDROID_WEBVIEW_NATIVE_AW_CONTENTS_H_
 
 #include <jni.h>
 #include <list>
 #include <string>
@@ skipping 121 matching lines @@
   void FindAllAsync(JNIEnv* env, jobject obj, jstring search_string);
   void FindNext(JNIEnv* env, jobject obj, jboolean forward);
   void ClearMatches(JNIEnv* env, jobject obj);
   FindHelper* GetFindHelper();
 
   // FindHelper::Listener implementation.
   virtual void OnFindResultReceived(int active_ordinal,
                                     int match_count,
                                     bool finished) OVERRIDE;
   // IconHelper::Listener implementation.
+  virtual bool ShouldDownloadFavicon(const GURL& icon_url) OVERRIDE;
   virtual void OnReceivedIcon(const GURL& icon_url,
                               const SkBitmap& bitmap) OVERRIDE;
   virtual void OnReceivedTouchIconUrl(const std::string& url,
                                       const bool precomposed) OVERRIDE;
 
   // AwRenderViewHostExtClient implementation.
   virtual void OnWebLayoutPageScaleFactorChanged(
       float page_scale_factor) OVERRIDE;
   virtual void OnWebLayoutContentsSizeChanged(
       const gfx::Size& contents_size) OVERRIDE;
@@ skipping 51 matching lines @@
   std::list<OriginCallback> pending_geolocation_prompts_;
 
   DISALLOW_COPY_AND_ASSIGN(AwContents);
 };
 
 bool RegisterAwContents(JNIEnv* env);
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_NATIVE_AW_CONTENTS_H_