Check whether Java bitmap memory size is same to one of SkBitmap

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 19 matching lines @@
  public:
   explicit JavaBitmap(jobject bitmap);
   ~JavaBitmap();
 
   inline void* pixels() { return pixels_; }
   inline const void* pixels() const { 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_; }
+  inline int byte_count() const { return byte_count_; }
 
   // 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_;
+  int byte_count_;
 
   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);
 
 // 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_