Refactor GL bindings so there is no global GLApi or DriverGL.

gpu/command_buffer/service/gpu_service_test.h

Index: gpu/command_buffer/service/gpu_service_test.h
diff --git a/gpu/command_buffer/service/gpu_service_test.h b/gpu/command_buffer/service/gpu_service_test.h
index 5634330cdae3ec4fd3633d08ebce71f9b274e8c3..2163a4e3abe9f493ab77c2ddd0217590c3bdedcb 100644
--- a/gpu/command_buffer/service/gpu_service_test.h
+++ b/gpu/command_buffer/service/gpu_service_test.h
@@ -14,7 +14,7 @@
 #include "ui/gl/gl_mock.h"
 
 namespace gl {
-class GLContextStubWithExtensions;
+class GLContextStub;
 class GLSurface;
 class GLSurfaceStub;
 }
@@ -40,7 +40,7 @@ class GpuServiceTest : public testing::Test {
  private:
   bool ran_setup_;
   bool ran_teardown_;
-  scoped_refptr<gl::GLContextStubWithExtensions> context_;
+  scoped_refptr<gl::GLContextStub> context_;
   scoped_refptr<gl::GLSurfaceStub> surface_;
   base::MessageLoop message_loop_;
 };