services/ui: Allow injecting the IO thread task runner for gpu channel.

content/renderer/render_thread_impl.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/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 619 matching lines @@
 
   lazy_tls.Pointer()->Set(this);
 
   // Register this object as the main thread.
   ChildProcess::current()->set_main_thread(this);
 
 #if defined(USE_AURA)
   if (IsRunningInMash()) {
     gpu_service_ =
         ui::GpuService::Initialize(GetMojoShellConnection()->GetConnector());
+    gpu_service_->SetIOThreadTaskRunner(
+        ChildProcess::current()->io_task_runner());
   }
 #endif
 
   InitializeWebKit(resource_task_queue);
 
   // In single process the single process is all there is.
   webkit_shared_timer_suspended_ = false;
   widget_count_ = 0;
   hidden_widget_count_ = 0;
   idle_notification_delay_in_ms_ = kInitialIdleHandlerDelayMs;
@@ skipping 1579 matching lines @@
       v8_memory_pressure_level == v8::MemoryPressureLevel::kCritical)
     v8_memory_pressure_level = v8::MemoryPressureLevel::kModerate;
 
   blink::mainThreadIsolate()->MemoryPressureNotification(
       v8_memory_pressure_level);
   blink::MemoryPressureNotificationToWorkerThreadIsolates(
       v8_memory_pressure_level);
 }
 
 }  // namespace content