Occlusion query feature is already in GL ES3.0 spec, not an extension.

gpu/command_buffer/service/feature_info_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/feature_info.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 1204 matching lines @@
   SetupInitExpectations("GL_ARB_occlusion_query2 GL_ARB_occlusion_query2");
   EXPECT_THAT(info_->extensions(),
               HasSubstr("GL_EXT_occlusion_query_boolean"));
   EXPECT_TRUE(info_->feature_flags().occlusion_query_boolean);
   EXPECT_TRUE(info_->feature_flags(
       ).use_arb_occlusion_query2_for_occlusion_query_boolean);
   EXPECT_FALSE(info_->feature_flags(
       ).use_arb_occlusion_query_for_occlusion_query_boolean);
 }
 
+TEST_P(FeatureInfoTest, InitializeGLES3_occlusion_query_boolean) {
+  SetupInitExpectationsWithGLVersion("", "", "OpenGL ES 3.0");
+  EXPECT_TRUE(info_->feature_flags().occlusion_query_boolean);
+}
+
 TEST_P(FeatureInfoTest, InitializeOES_vertex_array_object) {
   SetupInitExpectations("GL_OES_vertex_array_object");
   EXPECT_THAT(info_->extensions(),
       HasSubstr("GL_OES_vertex_array_object"));
   EXPECT_TRUE(info_->feature_flags().native_vertex_array_object);
 }
 
 TEST_P(FeatureInfoTest, InitializeARB_vertex_array_object) {
   SetupInitExpectations("GL_ARB_vertex_array_object");
   EXPECT_THAT(info_->extensions(),
@@ skipping 280 matching lines @@
   EXPECT_TRUE(info_->validators()->render_buffer_format.IsValid(GL_RG8_EXT));
 }
 
 TEST_P(FeatureInfoTest, InitializeCHROMIUM_ycbcr_422_imageTrue) {
   SetupInitExpectations("GL_APPLE_ycbcr_422");
   EXPECT_TRUE(info_->feature_flags().chromium_image_ycbcr_422);
 }
 
 }  // namespace gles2
 }  // namespace gpu