Fix blank video in Android WebView

content/browser/android/in_process/synchronous_compositor_impl.cc

 // Copyright 2013 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/browser/android/in_process/synchronous_compositor_impl.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 198 matching lines @@
       contents_->GetRenderWidgetHostView());
   if (rwhv)
     rwhv->SynchronousFrameMetadata(frame_metadata);
   DeliverMessages();
 }
 
 void SynchronousCompositorImpl::SetMemoryPolicy(size_t bytes_limit) {
   DCHECK(CalledOnValidThread());
   DCHECK(output_surface_);
 
+  size_t current_bytes_limit = output_surface_->GetMemoryPolicy();
   output_surface_->SetMemoryPolicy(bytes_limit);
+
+  if (bytes_limit && !current_bytes_limit) {
+    g_factory.Get().CompositorInitializedHardwareDraw();
+  } else if (!bytes_limit && current_bytes_limit) {
+    g_factory.Get().CompositorReleasedHardwareDraw();
+  }
 }
 
 void SynchronousCompositorImpl::PostInvalidate() {
   DCHECK(CalledOnValidThread());
   DCHECK(compositor_client_);
   compositor_client_->PostInvalidate();
 }
 
 void SynchronousCompositorImpl::DidChangeRootLayerScrollOffset() {
   if (input_handler_)
@@ skipping 131 matching lines @@
     g_factory.Get();  // Ensure it's initialized.
     SynchronousCompositorImpl::CreateForWebContents(contents);
   }
   SynchronousCompositorImpl* instance =
       SynchronousCompositorImpl::FromWebContents(contents);
   DCHECK(instance);
   instance->SetClient(client);
 }
 
 }  // namespace content