Implementation of GetFavicon for current tab.

chrome/android/java/src/org/chromium/chrome/browser/Tab.java

 // Copyright 2014 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.
 
 package org.chromium.chrome.browser;
 
 import android.app.Activity;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Color;
@@ skipping 865 matching lines @@
         if (mContentViewCore != null) return mContentViewCore.getTitle();
         return "";
     }
 
     /**
      * @return The bitmap of the favicon scaled to 16x16dp. null if no favicon
      *         is specified or it requires the default favicon.
      *         TODO(bauerb): Upstream implementation.
      */
     public Bitmap getFavicon() {
+        if (mNativeTabAndroid != 0)

[Bernhard Bauer, 2014/07/02 13:32:28]

Nit: I would probably invert this and bail out early if |mNativeTabAndroid| is
null.

[Jitu( very slow this week), 2014/07/02 13:54:55]

Done.

+            return nativeGetFavicon(mNativeTabAndroid);
         return null;
     }
 
     /**
      * Loads the tab if it's not loaded (e.g. because it was killed in background).
      * @return true iff tab load was triggered
      */
     @CalledByNative
     public boolean loadIfNeeded() {
         return false;
@@ skipping 248 matching lines @@
     private native void nativeDestroyWebContents(long nativeTabAndroid, boolean deleteNative);
     private native WebContents nativeGetWebContents(long nativeTabAndroid);
     private native Profile nativeGetProfileAndroid(long nativeTabAndroid);
     private native int nativeLoadUrl(long nativeTabAndroid, String url, String extraHeaders,
             byte[] postData, int transition, String referrerUrl, int referrerPolicy,
             boolean isRendererInitiated);
     private native int nativeGetSecurityLevel(long nativeTabAndroid);
     private native void nativeSetActiveNavigationEntryTitleForUrl(long nativeTabAndroid, String url,
             String title);
     private native boolean nativePrint(long nativeTabAndroid);
+    private native Bitmap nativeGetFavicon(long nativeTabAndroid);
 }