Revert of gpu: GPU service scheduler.

gpu/ipc/client/command_buffer_proxy_impl.cc

Index: gpu/ipc/client/command_buffer_proxy_impl.cc
diff --git a/gpu/ipc/client/command_buffer_proxy_impl.cc b/gpu/ipc/client/command_buffer_proxy_impl.cc
index 61aa361233b6630d70264b7d11a82bc7f739d19b..a7c730804a594879c095c8dd9a7b0e8a51122f38 100644
--- a/gpu/ipc/client/command_buffer_proxy_impl.cc
+++ b/gpu/ipc/client/command_buffer_proxy_impl.cc
@@ -60,6 +60,7 @@
       stream_id_(stream_id),
       weak_this_(AsWeakPtr()) {
   DCHECK(route_id);
+  DCHECK_NE(stream_id, GPU_STREAM_INVALID);
 }
 
 // static
@@ -68,7 +69,7 @@
     gpu::SurfaceHandle surface_handle,
     CommandBufferProxyImpl* share_group,
     int32_t stream_id,
-    gpu::SchedulingPriority stream_priority,
+    gpu::GpuStreamPriority stream_priority,
     const gpu::gles2::ContextCreationAttribHelper& attribs,
     const GURL& active_url,
     scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
@@ -671,6 +672,9 @@
 
   // If waiting on a different stream, flush pending commands on that stream.
   int32_t release_stream_id = sync_token.extra_data_field();
+  if (release_stream_id == gpu::GPU_STREAM_INVALID)
+    return false;
+
   if (release_stream_id != stream_id_)
     channel_->FlushPendingStream(release_stream_id);