Refactored GLContext to own GPUTiming which spawn GPUTimingClients.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 6b254e0966bb8ad2de4ee746bf53e6f7cb3dc269..c02dcb5dd355d9591022fb90d99dd86f41f854eb 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -2445,8 +2445,6 @@ bool GLES2DecoderImpl::Initialize(
   surfaceless_ = surface->IsSurfaceless() && !offscreen;
 
   set_initialized();
-  gpu_tracer_.reset(new GPUTracer(this));
-  gpu_state_tracer_ = GPUStateTracer::Create(&state_);
 
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableGPUDebugging)) {
@@ -2476,6 +2474,10 @@ bool GLES2DecoderImpl::Initialize(
   if (!attrib_parser.Parse(attribs))
     return false;
 
+  // Create GPU Tracer for timing values.
+  gpu_tracer_.reset(new GPUTracer(this));
+  gpu_state_tracer_ = GPUStateTracer::Create(&state_);

[vmiura, 2015/02/24 23:57:58]

nit: I think GPUStateTracer is not related to GPUTracer.  Revert this move?

[David Yen, 2015/02/25 01:47:35]

Done.

+
   // Save the loseContextWhenOutOfMemory context creation attribute.
   lose_context_when_out_of_memory_ =
       attrib_parser.lose_context_when_out_of_memory;