content: Increase thread priority for display critical IO threads on ChromeOS.

content/gpu/gpu_main.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 <stddef.h>
 #include <stdlib.h>
 
 #include <utility>
 
 #include "base/lazy_instance.h"
@@ skipping 376 matching lines @@
   }
 
   logging::SetLogMessageHandler(NULL);
 
   scoped_ptr<GpuMemoryBufferFactory> gpu_memory_buffer_factory;
   if (GpuMemoryBufferFactory::GetNativeType() != gfx::EMPTY_BUFFER)
     gpu_memory_buffer_factory = GpuMemoryBufferFactory::CreateNativeType();
 
   gpu::SyncPointManager sync_point_manager(false);
 
-  GpuProcess gpu_process;
+  base::ThreadPriority io_thread_priority = base::ThreadPriority::NORMAL;
+#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
+  io_thread_priority = base::ThreadPriority::DISPLAY;
+#endif
+
+  GpuProcess gpu_process(io_thread_priority);
 
   GpuChildThread* child_thread = new GpuChildThread(
       watchdog_thread.get(), dead_on_arrival, gpu_info, deferred_messages.Get(),
       gpu_memory_buffer_factory.get(),
       &sync_point_manager);
   while (!deferred_messages.Get().empty())
     deferred_messages.Get().pop();
 
   child_thread->Init(start_time);
 
@@ skipping 180 matching lines @@
     return true;
   }
 
   return false;
 }
 #endif  // defined(OS_WIN)
 
 }  // namespace.
 
 }  // namespace content