Change call-sites now that SkCanvas is not ref-counted

skia/ext/platform_canvas.cc

 // Copyright (c) 2011 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/platform_canvas.h"
 
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "build/build_config.h"
 #include "skia/ext/platform_device.h"
 #include "third_party/skia/include/core/SkMetaData.h"
 #include "third_party/skia/include/core/SkTypes.h"
 
 namespace {
 
 #if defined(OS_MACOSX)
 const char kIsPreviewMetafileKey[] = "CrIsPreviewMetafile";
 
@@ skipping 40 matching lines @@
 }
 
 bool SupportsPlatformPaint(const SkCanvas* canvas) {
   return GetPlatformDevice(canvas->getTopDevice(true)) != nullptr;
 }
 
 size_t PlatformCanvasStrideForWidth(unsigned width) {
   return 4 * width;
 }
 
-SkCanvas* CreateCanvas(const sk_sp<SkBaseDevice>& device,
-                       OnFailureType failureType) {
+std::unique_ptr<SkCanvas> CreateCanvas(const sk_sp<SkBaseDevice>& device,
+                                       OnFailureType failureType) {
   if (!device) {
     if (CRASH_ON_FAILURE == failureType)
       SK_CRASH();
     return nullptr;
   }
-  return new SkCanvas(device.get());
+  return base::MakeUnique<SkCanvas>(device.get());
 }
 
 SkMetaData& GetMetaData(const SkCanvas& canvas) {
   SkBaseDevice* device = canvas.getDevice();
   DCHECK(device != nullptr);
   return device->getMetaData();
 }
 
 #if defined(OS_MACOSX)
 void SetIsPreviewMetafile(const SkCanvas& canvas, bool is_preview) {
@@ skipping 25 matching lines @@
   if (platform_device) {
     // Compensate for drawing to a layer rather than the entire canvas
     SkMatrix ctm;
     SkIRect clip_bounds;
     canvas->temporary_internal_describeTopLayer(&ctm, &clip_bounds);
     native_drawing_context_ = platform_device->BeginPlatformPaint(ctm, clip_bounds);
   }
 }
 
 }  // namespace skia