android: Use UIResource for overscroll glow

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"
@@ skipping 39 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(JavaBitmap);
 };
 
 // Allocates a Java-backed bitmap (android.graphics.Bitmap) with the given
 // (non-empty!) size and color type.
 GFX_EXPORT base::android::ScopedJavaLocalRef<jobject> CreateJavaBitmap(
     int width,
     int height,
     SkColorType color_type);
 
-// Loads a Java-backed bitmap (android.graphics.Bitmap) from the provided
-// drawable resource identifier (e.g., android:drawable/overscroll_glow). If the
-// resource loads successfully, it will be integrally scaled down, preserving
-// aspect ratio, to a size no smaller than |size|. Otherwise, null is returned.
-GFX_EXPORT base::android::ScopedJavaLocalRef<jobject>
-    CreateJavaBitmapFromAndroidResource(const char* name, gfx::Size size);
+// Loads an SkBitmap from the provided drawable resource identifier (e.g.,
+// android:drawable/overscroll_glow). If the resource loads successfully, it
+// will be integrally scaled down, preserving aspect ratio, to a size no smaller
+// than |size|. Otherwise, an empty bitmap is returned.
+GFX_EXPORT SkBitmap
+    CreateSkBitmapFromAndroidResource(const char* name, gfx::Size size);
 
 // Converts |skbitmap| to a Java-backed bitmap (android.graphics.Bitmap).
 // Note: |skbitmap| is assumed to be non-null, non-empty and one of RGBA_8888 or
 // RGB_565 formats.
 GFX_EXPORT base::android::ScopedJavaLocalRef<jobject> ConvertToJavaBitmap(
     const SkBitmap* skbitmap);
 
 // Converts |bitmap| to an SkBitmap of the same size and format.
 // Note: |jbitmap| is assumed to be non-null, non-empty and of format RGBA_8888.
 GFX_EXPORT SkBitmap CreateSkBitmapFromJavaBitmap(const JavaBitmap& jbitmap);
 
 // Returns a Skia color type value for the requested input java Bitmap.Config.
 GFX_EXPORT SkColorType ConvertToSkiaColorType(jobject jbitmap_config);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_ANDROID_JAVA_BITMAP_H_