Introduce GpuVideoDecodeAcceleratorFactory.

content/common/gpu/media/vaapi_video_decode_accelerator.h

Index: content/common/gpu/media/vaapi_video_decode_accelerator.h
diff --git a/content/common/gpu/media/vaapi_video_decode_accelerator.h b/content/common/gpu/media/vaapi_video_decode_accelerator.h
index 11cc082a627469dd5def2b502f5b764ee8086d57..df385236941b65b66acea613479804a00d3eaca1 100644
--- a/content/common/gpu/media/vaapi_video_decode_accelerator.h
+++ b/content/common/gpu/media/vaapi_video_decode_accelerator.h
@@ -28,6 +28,7 @@
 #include "base/threading/thread.h"
 #include "content/common/content_export.h"
 #include "content/common/gpu/media/vaapi_wrapper.h"
+#include "content/public/common/gpu_video_decode_accelerator_helpers.h"
 #include "media/base/bitstream_buffer.h"
 #include "media/video/picture.h"
 #include "media/video/video_decode_accelerator.h"
@@ -55,9 +56,9 @@ class CONTENT_EXPORT VaapiVideoDecodeAccelerator
   class VaapiDecodeSurface;
 
   VaapiVideoDecodeAccelerator(
-      const base::Callback<bool(void)>& make_context_current,
-      const base::Callback<
-          void(uint32_t, uint32_t, scoped_refptr<gl::GLImage>)>& bind_image);
+      const gpu_vda_helpers::MakeGLContextCurrentCb& make_context_current_cb,
+      const gpu_vda_helpers::BindGLImageCb& bind_image_cb);
+
   ~VaapiVideoDecodeAccelerator() override;
 
   // media::VideoDecodeAccelerator implementation.
@@ -69,7 +70,10 @@ class CONTENT_EXPORT VaapiVideoDecodeAccelerator
   void Flush() override;
   void Reset() override;
   void Destroy() override;
-  bool CanDecodeOnIOThread() override;
+  bool TryInitializeDecodeOnSeparateThread(
+      const base::WeakPtr<Client>& decode_client,
+      const scoped_refptr<base::SingleThreadTaskRunner>& decode_task_runner)
+      override;
 
   static media::VideoDecodeAccelerator::SupportedProfiles
       GetSupportedProfiles();
@@ -180,10 +184,6 @@ class CONTENT_EXPORT VaapiVideoDecodeAccelerator
   // available.
   scoped_refptr<VaapiDecodeSurface> CreateSurface();
 
-
-  // Client-provided GL state.
-  base::Callback<bool(void)> make_context_current_;
-
   // VAVDA state.
   enum State {
     // Initialize() not called yet or failed.
@@ -305,10 +305,11 @@ class CONTENT_EXPORT VaapiVideoDecodeAccelerator
   size_t requested_num_pics_;
   gfx::Size requested_pic_size_;
 
-  // Binds the provided GLImage to a givenr client texture ID & texture target
-  // combination in GLES.
-  base::Callback<void(uint32_t, uint32_t, scoped_refptr<gl::GLImage>)>
-      bind_image_;
+  // Callback to make GL context current.
+  gpu_vda_helpers::MakeGLContextCurrentCb make_context_current_cb_;
+
+  // Callback to bind a GLImage to a given texture.
+  gpu_vda_helpers::BindGLImageCb bind_image_cb_;
 
   // The WeakPtrFactory for |weak_this_|.
   base::WeakPtrFactory<VaapiVideoDecodeAccelerator> weak_this_factory_;