media: Optimize HW Video to 2D Canvas copy.

media/blink/webmediaplayer_params.h

Index: media/blink/webmediaplayer_params.h
diff --git a/media/blink/webmediaplayer_params.h b/media/blink/webmediaplayer_params.h
index c765548d4b009b10b8ea77c98f4ea512be62ef54..682c1467124b62fe2d708bad800458194e9a071b 100644
--- a/media/blink/webmediaplayer_params.h
+++ b/media/blink/webmediaplayer_params.h
@@ -7,6 +7,7 @@
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
+#include "cc/output/context_provider.h"
 #include "media/base/media_export.h"
 #include "media/blink/encrypted_media_player_support.h"
 
@@ -33,6 +34,7 @@ class MEDIA_EXPORT WebMediaPlayerParams {
   typedef base::Callback<scoped_ptr<EncryptedMediaPlayerSupport>(
       blink::WebMediaPlayerClient*)> EncryptedMediaPlayerSupportCreateCB;
   typedef base::Callback<void(const base::Closure&)> DeferLoadCB;
+  typedef base::Callback<cc::ContextProvider*()> ContextProviderCB;
 
   // |defer_load_cb|, |audio_renderer_sink|, and |compositor_task_runner| may be
   // null.
@@ -46,13 +48,12 @@ class MEDIA_EXPORT WebMediaPlayerParams {
       const scoped_refptr<base::SingleThreadTaskRunner>& compositor_task_runner,
       const EncryptedMediaPlayerSupportCreateCB&
           encrypted_media_player_support_cb,
+      const ContextProviderCB& shared_main_thread_context_provider_cb,
       blink::WebContentDecryptionModule* initial_cdm);
 
   ~WebMediaPlayerParams();
 
-  base::Callback<void(const base::Closure&)> defer_load_cb() const {
-    return defer_load_cb_;
-  }
+  DeferLoadCB defer_load_cb() const { return defer_load_cb_; }
 
   const scoped_refptr<AudioRendererSink>& audio_renderer_sink() const {
     return audio_renderer_sink_;
@@ -84,8 +85,12 @@ class MEDIA_EXPORT WebMediaPlayerParams {
   scoped_ptr<EncryptedMediaPlayerSupport>
   CreateEncryptedMediaPlayerSupport(blink::WebMediaPlayerClient* client) const;
 
+  ContextProviderCB shared_main_thread_context_provider_cb() const {
+    return shared_main_thread_context_provider_cb_;
+  }
+
  private:
-  base::Callback<void(const base::Closure&)> defer_load_cb_;
+  DeferLoadCB defer_load_cb_;
   scoped_refptr<AudioRendererSink> audio_renderer_sink_;
   const AudioHardwareConfig& audio_hardware_config_;
   scoped_refptr<MediaLog> media_log_;
@@ -93,6 +98,7 @@ class MEDIA_EXPORT WebMediaPlayerParams {
   scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner_;
   EncryptedMediaPlayerSupportCreateCB encrypted_media_player_support_cb_;
+  ContextProviderCB shared_main_thread_context_provider_cb_;
   blink::WebContentDecryptionModule* initial_cdm_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(WebMediaPlayerParams);