Fix video->canvas with alpha in SW video->HW canvas case.

media/filters/skcanvas_video_renderer.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 "media/filters/skcanvas_video_renderer.h"
 
 #include "gpu/GLES2/gl2extchromium.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "gpu/command_buffer/common/mailbox_holder.h"
 #include "media/base/video_frame.h"
@@ skipping 336 matching lines @@
     ConvertVideoFrameToRGBPixels(frame_, pixels, row_bytes);
     return true;
   }
 
   bool onGetYUV8Planes(SkISize sizes[3],
                        void* planes[3],
                        size_t row_bytes[3],
                        SkYUVColorSpace* color_space) override {
     if (!frame_.get() || !IsYUV(frame_->format()) ||
         // TODO(rileya): Skia currently doesn't support Rec709 YUV conversion,
-        // Remove this case once it does. As-is we will fall back on the
-        // pure-software path in this case.
-        frame_->format() == VideoFrame::YV12HD) {
+        // or YUVA conversion. Remove this case once it does. As-is we will
+        // fall back on the pure-software path in this case.
+        frame_->format() == VideoFrame::YV12HD ||
+        frame_->format() == VideoFrame::YV12A) {
       return false;
     }
 
     if (color_space) {
       if (IsJPEGColorSpace(frame_->format()))
         *color_space = kJPEG_SkYUVColorSpace;
       else
         *color_space = kRec601_SkYUVColorSpace;
     }
 
@@ skipping 246 matching lines @@
   last_frame_timestamp_ = media::kNoTimestamp();
 }
 
 void SkCanvasVideoRenderer::ResetAcceleratedLastFrame() {
   accelerated_last_frame_.reset();
   accelerated_generator_ = nullptr;
   accelerated_last_frame_timestamp_ = media::kNoTimestamp();
 }
 
 }  // namespace media