[Android] Modify CreateJavaBitmap to accept SkBitmap::Config and export the API.

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 31 matching lines @@
  private:
   jobject bitmap_;
   void* pixels_;
   gfx::Size size_;
   int format_;
   uint32_t stride_;
 
   DISALLOW_COPY_AND_ASSIGN(JavaBitmap);
 };
 
+GFX_EXPORT base::android::ScopedJavaLocalRef<jobject> CreateJavaBitmap(

[jdduke (slow), 2014/03/06 01:18:19]

While it may seem self-explanatory, please put a short note here indicating what
exactly this does (i.e., Allocates a Java-backed bitmap with the given size and
format).  It may not be immediately clear given that there's also a |JavaBitmap|
class in this same header file, which isn't actually being created.

+    int width,
+    int height,
+    SkBitmap::Config bitmap_config);
+
 GFX_EXPORT base::android::ScopedJavaLocalRef<jobject> ConvertToJavaBitmap(
     const SkBitmap* skbitmap);
 
 GFX_EXPORT SkBitmap CreateSkBitmapFromJavaBitmap(JavaBitmap& jbitmap);
 
 // If the resource loads successfully, it will be resized to |size|.
 // Note: If the source resource is smaller than |size|, quality may suffer.
 GFX_EXPORT SkBitmap CreateSkBitmapFromResource(const char* name,
                                                gfx::Size size);
 
 // Returns a Skia config value for the requested input java Bitmap.Config.
 GFX_EXPORT SkBitmap::Config ConvertToSkiaConfig(jobject bitmap_config);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_ANDROID_JAVA_BITMAP_H_