Introduce PlatformBitmap, which is a minimal helper class that wraps an SkBitmap

skia/ext/bitmap_platform_device_android.cc

 // 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.
 
 #include "skia/ext/bitmap_platform_device_android.h"
+#include "skia/ext/platform_canvas.h"
 
 namespace skia {
 
 BitmapPlatformDevice* BitmapPlatformDevice::Create(int width, int height,
                                                    bool is_opaque) {
   SkBitmap bitmap;
   bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
   if (bitmap.allocPixels()) {
     bitmap.setIsOpaque(is_opaque);
     // Follow the logic in SkCanvas::createDevice(), initialize the bitmap if it
@@ skipping 48 matching lines @@
   // pixels? Maybe this won't be called at all.
   return accessBitmap(true).getPixels();
 }
 
 void BitmapPlatformDevice::DrawToNativeContext(
     PlatformSurface surface, int x, int y, const PlatformRect* src_rect) {
   // Should never be called on Android.
   SkASSERT(false);
 }
 
+// Port of PlatformBitmap to android
+
+PlatformBitmap::~PlatformBitmap() {}
+
+bool PlatformBitmap::Allocate(int width, int height, bool is_opaque) {
+  bitmap_.setConfig(SkBitmap::kARGB_8888_Config, width, height);
+  if (!bitmap_.allocPixels())
+    return false;
+
+  bitmap_.setIsOpaque(is_opaque);
+  surface_ = bitmap_.getPixels();
+  return true;
+}
+
 }  // namespace skia