Fix racing which may pause gpu process's interface registry forever

content/gpu/gpu_child_thread.cc

 // Copyright (c) 2012 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/gpu/gpu_child_thread.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 285 matching lines @@
   connection->GetInterfaceRegistry()->AddInterface(base::Bind(
       &GpuChildThread::BindProcessControlRequest, base::Unretained(this)));
 
   if (GetContentClient()->gpu()) {  // NULL in tests.
     GetContentClient()->gpu()->ExposeInterfacesToBrowser(
         connection->GetInterfaceRegistry());
   }
 
   // We don't want to process any incoming interface requests until
   // OnInitialize().
-  connection->GetInterfaceRegistry()->PauseBinding();
-  resume_interface_bindings_callback_ = base::Bind(
-      &shell::InterfaceRegistry::ResumeBinding,
-      connection->GetInterfaceRegistry()->GetWeakPtr());
+  if (!gpu_channel_manager_) {
+    connection->GetInterfaceRegistry()->PauseBinding();
+    resume_interface_bindings_callback_ = base::Bind(
+        &shell::InterfaceRegistry::ResumeBinding,
+        connection->GetInterfaceRegistry()->GetWeakPtr());
+  }
 
   return true;
 }
 
 shell::InterfaceRegistry* GpuChildThread::GetInterfaceRegistryForConnection() {
   return nullptr;
 }
 
 shell::InterfaceProvider* GpuChildThread::GetInterfaceProviderForConnection() {
   return nullptr;
@@ skipping 263 matching lines @@
 
 void GpuChildThread::BindProcessControlRequest(
     mojo::InterfaceRequest<mojom::ProcessControl> request) {
   DVLOG(1) << "GPU: Binding ProcessControl request";
   DCHECK(process_control_);
   process_control_bindings_.AddBinding(process_control_.get(),
                                        std::move(request));
 }
 
 }  // namespace content