Add skia::RefPtr class to wrap ref counted classes from Skia.

skia/ext/bitmap_platform_device_mac.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_mac.h"
 
 #import <ApplicationServices/ApplicationServices.h>
 #include <time.h>
 
 #include "base/mac/mac_util.h"
@@ skipping 138 matching lines @@
 #endif
 
   if (!context) {
     context = CGContextForData(data, width, height);
     if (!context)
       return NULL;
   } else
     CGContextRetain(context);
 
   BitmapPlatformDevice* rv = new BitmapPlatformDevice(
-      new BitmapPlatformDeviceData(context), bitmap);
+      skia::AdoptRef(new BitmapPlatformDeviceData(context)), bitmap);
 
   // The device object took ownership of the graphics context with its own
   // CGContextRetain call.
   CGContextRelease(context);
 
   return rv;
 }
 
 BitmapPlatformDevice* BitmapPlatformDevice::CreateAndClear(int width,
                                                            int height,
@@ skipping 18 matching lines @@
   // CGContextRetain call.
   if (context)
     CGContextRelease(context);
 
   return rv;
 }
 
 // The device will own the bitmap, which corresponds to also owning the pixel
 // data. Therefore, we do not transfer ownership to the SkDevice's bitmap.
 BitmapPlatformDevice::BitmapPlatformDevice(
-    BitmapPlatformDeviceData* data, const SkBitmap& bitmap)
+    const skia::RefPtr<BitmapPlatformDeviceData>& data, const SkBitmap& bitmap)
     : SkDevice(bitmap),
       data_(data) {
   SetPlatformDevice(this, this);
 }
 
 BitmapPlatformDevice::~BitmapPlatformDevice() {
-  data_->unref();
 }
 
 CGContextRef BitmapPlatformDevice::GetBitmapContext() {
   data_->LoadConfig();
   return data_->bitmap_context();
 }
 
 void BitmapPlatformDevice::setMatrixClip(const SkMatrix& transform,
                                          const SkRegion& region,
                                          const SkClipStack&) {
@@ skipping 42 matching lines @@
   SkASSERT(config == SkBitmap::kARGB_8888_Config);
   SkDevice* bitmap_device = BitmapPlatformDevice::CreateAndClear(width, height,
                                                                  isOpaque);
   return bitmap_device;
 }
 
 // PlatformCanvas impl
 
 SkCanvas* CreatePlatformCanvas(CGContextRef ctx, int width, int height,
                                bool is_opaque, OnFailureType failureType) {
-  SkDevice* dev = BitmapPlatformDevice::Create(ctx, width, height, is_opaque);
+  skia::RefPtr<SkDevice> dev = skia::AdoptRef(
+      BitmapPlatformDevice::Create(ctx, width, height, is_opaque));
   return CreateCanvas(dev, failureType);
 }
 
 SkCanvas* CreatePlatformCanvas(int width, int height, bool is_opaque,
                                uint8_t* data, OnFailureType failureType) {
-  SkDevice* dev = BitmapPlatformDevice::CreateWithData(data, width, height,
-                                                       is_opaque);
+  skia::RefPtr<SkDevice> dev = skia::AdoptRef(
+      BitmapPlatformDevice::CreateWithData(data, width, height, is_opaque));
   return CreateCanvas(dev, failureType);
 }
 
 // Port of PlatformBitmap to mac
 
 PlatformBitmap::~PlatformBitmap() {
   if (surface_)
     CGContextRelease(surface_);
 }
 
 bool PlatformBitmap::Allocate(int width, int height, bool is_opaque) {
   if (RasterDeviceTooBigToAllocate(width, height))
     return false;
     
   bitmap_.setConfig(SkBitmap::kARGB_8888_Config, width, height, width * 4);
   if (!bitmap_.allocPixels())
       return false;
 
   if (!is_opaque)
     bitmap_.eraseColor(0);
   bitmap_.setIsOpaque(is_opaque);
 
   surface_ = CGContextForData(bitmap_.getPixels(), bitmap_.width(),
                               bitmap_.height());
   return true;
 }
 
 }  // namespace skia