Make GL bindings conditional

gpu/command_buffer/service/gpu_tracer_unittest.cc

Index: gpu/command_buffer/service/gpu_tracer_unittest.cc
diff --git a/gpu/command_buffer/service/gpu_tracer_unittest.cc b/gpu/command_buffer/service/gpu_tracer_unittest.cc
index 1b55e785e4517576c002fbd6fc90183d4582c150..30067b6eb4b002e5e076e8f215927cb9eef6cf95 100644
--- a/gpu/command_buffer/service/gpu_tracer_unittest.cc
+++ b/gpu/command_buffer/service/gpu_tracer_unittest.cc
@@ -225,7 +225,10 @@ class BaseGpuTest : public GpuServiceTest {
 
  protected:
   void SetUp() override {
-    GpuServiceTest::SetUp();
+    // TODO: The tracer code is wrong and assumes that getInteger64v
+    // is available when timer_query or disjoint_timer exists.

[piman, 2015/01/23 01:38:16]

GL_ARB_timer_query requires GL 3.2

GL_EXT_disjoint_timer_query mentions glGetInteger64v, present in ES 3.0, but the
extension only requires ES 2.0, so I guess it has a spec bug :)

+    GpuServiceTest::SetUpWithGLVersion(
+        "3.2", "GL_EXT_disjoint_timer_query GL_ARB_timer_query");
     gl_fake_queries_.Reset();
     gl_surface_ = new gfx::GLSurfaceStub();
     gl_context_ = new gfx::GLContextStub();