Remove uses of skia::GetWritablePixels(PaintCanvas)

cc/resources/video_resource_updater.cc

 // Copyright 2013 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 "cc/resources/video_resource_updater.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 499 matching lines @@
     DCHECK_EQ(software_compositor, plane_resource.mailbox().IsZero());
 
     if (!plane_resource.Matches(video_frame->unique_id(), 0)) {
       // We need to transfer data from |video_frame| to the plane resource.
       if (software_compositor) {
         if (!video_renderer_)
           video_renderer_.reset(new media::SkCanvasVideoRenderer);
 
         ResourceProvider::ScopedWriteLockSoftware lock(
             resource_provider_, plane_resource.resource_id());
-        SkCanvas canvas(lock.sk_bitmap());
+        PaintCanvas canvas(lock.sk_bitmap());
         // This is software path, so canvas and video_frame are always backed
         // by software.
         video_renderer_->Copy(video_frame, &canvas, media::Context3D());
       } else {
         size_t bytes_per_row = ResourceUtil::CheckedWidthInBytes<size_t>(
             video_frame->coded_size().width(), ResourceFormat::RGBA_8888);
         size_t needed_size = bytes_per_row * video_frame->coded_size().height();
         if (upload_pixels_.size() < needed_size)
           upload_pixels_.resize(needed_size);
 
@@ skipping 281 matching lines @@
   if (lost_resource) {
     resource_it->clear_refs();
     updater->DeleteResource(resource_it);
     return;
   }
 
   resource_it->remove_ref();
 }
 
 }  // namespace cc