Introduce separate client and init path for single-threaded cc

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index 844176733625fddfa9f4da9eb7a4a4ef38809d06..2b7b6f02e9c4a08e5671970b0bda7fed5e6e2006 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -827,11 +827,6 @@ void RenderWidgetHostViewAndroid::BuffersSwapped(
   ImageTransportFactoryAndroid* factory =
       ImageTransportFactoryAndroid::GetInstance();
 
-  // TODO(sievers): When running the impl thread in the browser we
-  // need to delay the ACK until after commit and use more than a single
-  // texture.
-  DCHECK(!CompositorImpl::IsThreadingEnabled());
-
   if (!texture_id_in_layer_) {
     texture_id_in_layer_ = factory->CreateTexture();
     texture_layer_->SetIsDrawable(true);