Use GLVersionInfo instead of gl::GetGLImplementation() to decide GL paths

gpu/command_buffer/service/test_helper.cc

Index: gpu/command_buffer/service/test_helper.cc
diff --git a/gpu/command_buffer/service/test_helper.cc b/gpu/command_buffer/service/test_helper.cc
index 59363f86733a495b4cd9f935d4cf78881864d6d9..b0714d9454784d63e1f88ae56bf0ca4d2ef87655 100644
--- a/gpu/command_buffer/service/test_helper.cc
+++ b/gpu/command_buffer/service/test_helper.cc
@@ -1184,16 +1184,6 @@ sh::OutputVariable TestHelper::ConstructOutputVariable(
       type, array_size, precision, static_use, name);
 }
 
-ScopedGLImplementationSetter::ScopedGLImplementationSetter(
-    gl::GLImplementation implementation)
-    : old_implementation_(gl::GetGLImplementation()) {
-  gl::SetGLImplementation(implementation);
-}
-
-ScopedGLImplementationSetter::~ScopedGLImplementationSetter() {
-  gl::SetGLImplementation(old_implementation_);
-}
-
 }  // namespace gles2
 }  // namespace gpu