Fix glGetQueryObjectiv call on devices which expect EXT variants.

gpu/command_buffer/service/gpu_tracer.cc

Index: gpu/command_buffer/service/gpu_tracer.cc
diff --git a/gpu/command_buffer/service/gpu_tracer.cc b/gpu/command_buffer/service/gpu_tracer.cc
index 364159ba4ccd02842b84ab5ad503d80a4d45fda8..3549fbac8bf53ab3861fb30c59c93e43fa9160ad 100644
--- a/gpu/command_buffer/service/gpu_tracer.cc
+++ b/gpu/command_buffer/service/gpu_tracer.cc
@@ -180,7 +180,7 @@ bool GPUTrace::IsAvailable() {
       return false;
 
     GLint done = 0;
-    glGetQueryObjectiv(queries_[1], GL_QUERY_RESULT_AVAILABLE, &done);
+    glGetQueryObjectivARB(queries_[1], GL_QUERY_RESULT_AVAILABLE, &done);

[no sievers, 2015/01/21 23:24:45]

So ignoring everything we do in other places (like the decoder), I think the
current code is correct: For GL_ARB_timer_query at least which is written
against desktop GL 3.2, which will have this entry point.
For GLES, it should however be GetQueryObjectivEXT().

     return !!done;
   }