Automatically start the GPU process 5s after browser startup.

content/common/gpu/gpu_process_launch_causes.h

Index: content/common/gpu/gpu_process_launch_causes.h
diff --git a/content/common/gpu/gpu_process_launch_causes.h b/content/common/gpu/gpu_process_launch_causes.h
index b9c05fdd4236dd08d1ab5d7bd5af16cecbf3581f..9b16b47e61a5aef6a4b26be1050a9d5874940bcc 100644
--- a/content/common/gpu/gpu_process_launch_causes.h
+++ b/content/common/gpu/gpu_process_launch_causes.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -18,6 +18,7 @@ enum CauseForGpuLaunch {
   CAUSE_FOR_GPU_LAUNCH_NO_LAUNCH,
   CAUSE_FOR_GPU_LAUNCH_VIDEODECODEACCELERATOR_INITIALIZE,
   CAUSE_FOR_GPU_LAUNCH_PEPPERPLATFORMCONTEXT3DIMPL_INITIALIZE,
+  CAUSE_FOR_GPU_LAUNCH_BROWSER_STARTUP,
 
   // All new values should be inserted above this point so that
   // existing values continue to match up with those in histograms.xml.