Support external buffer import in VDA interface and add a V4L2SVDA impl.

content/public/gpu/gpu_video_decode_accelerator_factory.cc

 // Copyright 2016 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 "content/public/gpu/gpu_video_decode_accelerator_factory.h"
 
 #include "base/memory/ptr_util.h"
 #include "content/common/gpu/media/gpu_video_decode_accelerator_factory_impl.h"
 #include "content/gpu/gpu_child_thread.h"
 
@@ skipping 28 matching lines @@
           get_gl_context_cb, make_context_current_cb, bind_image_cb,
           get_gles2_decoder_cb);
   if (!gvdafactory_impl)
     return nullptr;
 
   return base::WrapUnique(
       new GpuVideoDecodeAcceleratorFactory(std::move(gvdafactory_impl)));
 }
 
 // static
+std::unique_ptr<GpuVideoDecodeAcceleratorFactory>
+GpuVideoDecodeAcceleratorFactory::CreateWithNoGL() {
+  auto gvdafactory_impl =
+      GpuVideoDecodeAcceleratorFactoryImpl::CreateWithNoGL();
+  if (!gvdafactory_impl)
+    return nullptr;
+
+  return base::WrapUnique(
+      new GpuVideoDecodeAcceleratorFactory(std::move(gvdafactory_impl)));
+}
+
+// static
 gpu::VideoDecodeAcceleratorCapabilities
 GpuVideoDecodeAcceleratorFactory::GetDecoderCapabilities() {
   const gpu::GpuPreferences gpu_preferences =
       GpuChildThread::current()->gpu_preferences();
   return GpuVideoDecodeAcceleratorFactoryImpl::GetDecoderCapabilities(
       gpu_preferences);
 }
 
 std::unique_ptr<media::VideoDecodeAccelerator>
 GpuVideoDecodeAcceleratorFactory::CreateVDA(
     media::VideoDecodeAccelerator::Client* client,
     const media::VideoDecodeAccelerator::Config& config) {
   if (!gvdafactory_impl_)
     return nullptr;
 
   const gpu::GpuPreferences gpu_preferences =
       GpuChildThread::current()->gpu_preferences();
   return gvdafactory_impl_->CreateVDA(client, config, gpu_preferences);
 }
 
 GpuVideoDecodeAcceleratorFactory::GpuVideoDecodeAcceleratorFactory(
     std::unique_ptr<GpuVideoDecodeAcceleratorFactoryImpl> gvdafactory_impl)
     : gvdafactory_impl_(std::move(gvdafactory_impl)) {}
 
 }  // namespace content