Use correct favicon scale factor on Android.

ui/gfx/android/java_bitmap.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 UI_GFX_ANDROID_JAVA_BITMAP_H_
 #define UI_GFX_ANDROID_JAVA_BITMAP_H_
 
+#include <jni.h>
+
 #include "base/android/scoped_java_ref.h"
 #include "ui/gfx/size.h"
 
 class SkBitmap;
 
 namespace gfx {
 
 // This class wraps a JNI AndroidBitmap object to make it easier to use. It
 // handles locking and unlocking of the underlying pixels, along with wrapping
 // various JNI methods.
 class UI_EXPORT JavaBitmap {
  public:
   explicit JavaBitmap(jobject bitmap);
   ~JavaBitmap();
 
   inline void* pixels() { return pixels_; }
   inline const gfx::Size& size() const { return size_; }
   // Formats are in android/bitmap.h; e.g. ANDROID_BITMAP_FORMAT_RGBA_8888
   inline int format() const { return format_; }
   inline uint32_t stride() const { return stride_; }
 
+  // Registers methods with JNI and returns true if succeeded.
+  static bool RegisterJavaBitmap(JNIEnv* env);
+
  private:
   jobject bitmap_;
   void* pixels_;
   gfx::Size size_;
   int format_;
   uint32_t stride_;
 
   DISALLOW_COPY_AND_ASSIGN(JavaBitmap);
 };
 
 UI_EXPORT base::android::ScopedJavaLocalRef<jobject> CreateJavaBitmap(
     const gfx::Size& size);
 
 UI_EXPORT base::android::ScopedJavaLocalRef<jobject> ConvertToJavaBitmap(
     const SkBitmap* skbitmap);
 
 SkBitmap CreateSkBitmapFromResource(const char* name);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_ANDROID_JAVA_BITMAP_H_