Some favicon cleanup/upstreaming

chrome/browser/android/tab_android.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_ANDROID_TAB_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_TAB_ANDROID_H_
 
 #include <jni.h>
 
 #include "base/android/jni_weak_ref.h"
@@ skipping 133 matching lines @@
   ToolbarModel::SecurityLevel GetSecurityLevel(JNIEnv* env, jobject obj);
   void SetActiveNavigationEntryTitleForUrl(JNIEnv* env,
                                            jobject obj,
                                            jstring jurl,
                                            jstring jtitle);
   bool Print(JNIEnv* env, jobject obj);
   // Called to get favicon of current tab, return null if no favicon is
   // avaliable for current tab.
   base::android::ScopedJavaLocalRef<jobject> GetFavicon(JNIEnv* env,
                                                         jobject obj);
+  jboolean IsFaviconValid(JNIEnv* env, jobject jobj);
 
   // Register the Tab's native methods through JNI.
   static bool RegisterTabAndroid(JNIEnv* env);
 
  private:
   prerender::PrerenderManager* GetPrerenderManager() const;
 
   JavaObjectWeakGlobalRef weak_java_tab_;
 
   // The identifier used by session restore for this tab.
   SessionID session_tab_id_;
 
   // Identifier of the window the tab is in.
   SessionID session_window_id_;
 
   content::NotificationRegistrar notification_registrar_;
 
   scoped_ptr<content::WebContents> web_contents_;
   scoped_ptr<chrome::android::ChromeWebContentsDelegateAndroid>
       web_contents_delegate_;
 
   scoped_ptr<browser_sync::SyncedTabDelegateAndroid> synced_tab_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(TabAndroid);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_TAB_ANDROID_H_