Introduce GpuVideoDecodeAcceleratorFactory.

content/common/gpu/media/android_video_decode_accelerator.cc

Index: content/common/gpu/media/android_video_decode_accelerator.cc
diff --git a/content/common/gpu/media/android_video_decode_accelerator.cc b/content/common/gpu/media/android_video_decode_accelerator.cc
index 3942a80ff3b4b27e042912b7853cfaac8cdc1702..5c1a90c6f9a3fef8b44723ce10bdec677b6a9210 100644
--- a/content/common/gpu/media/android_video_decode_accelerator.cc
+++ b/content/common/gpu/media/android_video_decode_accelerator.cc
@@ -239,32 +239,21 @@ static base::LazyInstance<AVDATimerManager>::Leaky g_avda_timer =
     LAZY_INSTANCE_INITIALIZER;
 
 AndroidVideoDecodeAccelerator::AndroidVideoDecodeAccelerator(
-    const base::WeakPtr<gpu::gles2::GLES2Decoder> decoder,
-    const base::Callback<bool(void)>& make_context_current)
+    const gpu_vda_helpers::MakeGLContextCurrentCb& make_context_current_cb,
+    const gpu_vda_helpers::GetGLES2DecoderCb& get_gles2_decoder_cb)
     : client_(NULL),
-      make_context_current_(make_context_current),
+      make_context_current_cb_(make_context_current_cb),
+      get_gles2_decoder_cb_(get_gles2_decoder_cb),
       codec_(media::kCodecH264),
       is_encrypted_(false),
       needs_protected_surface_(false),
       state_(NO_ERROR),
       picturebuffers_requested_(false),
-      gl_decoder_(decoder),
       cdm_registration_id_(0),
       pending_input_buf_index_(-1),
       error_sequence_token_(0),
       defer_errors_(false),
-      weak_this_factory_(this) {
-  if (UseDeferredRenderingStrategy()) {
-    // TODO(liberato, watk): Figure out what we want to do about zero copy for
-    // fullscreen external SurfaceView in WebView.  http://crbug.com/582170.
-    DCHECK(!gl_decoder_->GetContextGroup()->mailbox_manager()->UsesSync());
-    DVLOG(1) << __FUNCTION__ << ", using deferred rendering strategy.";
-    strategy_.reset(new AndroidDeferredRenderingBackingStrategy(this));
-  } else {
-    DVLOG(1) << __FUNCTION__ << ", using copy back strategy.";
-    strategy_.reset(new AndroidCopyingBackingStrategy(this));
-  }
-}
+      weak_this_factory_(this) {}
 
 AndroidVideoDecodeAccelerator::~AndroidVideoDecodeAccelerator() {
   DCHECK(thread_checker_.CalledOnValidThread());
@@ -287,6 +276,11 @@ bool AndroidVideoDecodeAccelerator::Initialize(const Config& config,
 
   DVLOG(1) << __FUNCTION__ << ": " << config.AsHumanReadableString();
 
+  if (make_context_current_cb_.is_null() || get_gles2_decoder_cb_.is_null()) {
+    NOTREACHED() << "GL callbacks are required for this VDA";
+    return false;
+  }
+
   DCHECK(client);
   client_ = client;
   codec_ = VideoCodecProfileToVideoCodec(config.profile);
@@ -314,13 +308,24 @@ bool AndroidVideoDecodeAccelerator::Initialize(const Config& config,
     }
   }
 
-  if (!make_context_current_.Run()) {
-    LOG(ERROR) << "Failed to make this decoder's GL context current.";
-    return false;
+  if (UseDeferredRenderingStrategy()) {
+    // TODO(liberato, watk): Figure out what we want to do about zero copy for
+    // fullscreen external SurfaceView in WebView.  http://crbug.com/582170.
+    auto gles_decoder = get_gles2_decoder_cb_.Run();
+    if (!gles_decoder) {
+      LOG(ERROR) << "Failed to get gles2 decoder instance.";
+      return false;
+    }
+    DCHECK(!gles_decoder->GetContextGroup()->mailbox_manager()->UsesSync());
+    DVLOG(1) << __FUNCTION__ << ", using deferred rendering strategy.";
+    strategy_.reset(new AndroidDeferredRenderingBackingStrategy(this));
+  } else {
+    DVLOG(1) << __FUNCTION__ << ", using copy back strategy.";
+    strategy_.reset(new AndroidCopyingBackingStrategy(this));
   }
 
-  if (!gl_decoder_) {
-    LOG(ERROR) << "Failed to get gles2 decoder instance.";
+  if (!make_context_current_cb_.Run()) {
+    LOG(ERROR) << "Failed to make this decoder's GL context current.";
     return false;
   }
 
@@ -697,7 +702,7 @@ void AndroidVideoDecodeAccelerator::SendDecodedFrameToClient(
   DCHECK(!free_picture_ids_.empty());
   TRACE_EVENT0("media", "AVDA::SendDecodedFrameToClient");
 
-  if (!make_context_current_.Run()) {
+  if (!make_context_current_cb_.Run()) {
     POST_ERROR(PLATFORM_FAILURE, "Failed to make the GL context current.");
     return;
   }
@@ -960,7 +965,7 @@ void AndroidVideoDecodeAccelerator::Reset() {
 void AndroidVideoDecodeAccelerator::Destroy() {
   DCHECK(thread_checker_.CalledOnValidThread());
 
-  bool have_context = make_context_current_.Run();
+  bool have_context = make_context_current_cb_.Run();
   if (!have_context)
     LOG(WARNING) << "Failed make GL context current for Destroy, continuing.";
 
@@ -980,7 +985,9 @@ void AndroidVideoDecodeAccelerator::Destroy() {
   delete this;
 }
 
-bool AndroidVideoDecodeAccelerator::CanDecodeOnIOThread() {
+bool AndroidVideoDecodeAccelerator::TryInitializeDecodeOnSeparateThread(
+    const base::WeakPtr<Client>& decode_client,
+    const scoped_refptr<base::SingleThreadTaskRunner>& decode_task_runner) {
   return false;
 }
 
@@ -995,7 +1002,7 @@ const base::ThreadChecker& AndroidVideoDecodeAccelerator::ThreadChecker()
 
 base::WeakPtr<gpu::gles2::GLES2Decoder>
 AndroidVideoDecodeAccelerator::GetGlDecoder() const {
-  return gl_decoder_;
+  return get_gles2_decoder_cb_.Run();
 }
 
 void AndroidVideoDecodeAccelerator::OnFrameAvailable() {