gpu: Add ARB_occlusion_query support.

gpu/command_buffer/service/query_manager_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 <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
@@ skipping 936 matching lines @@
       .RetiresOnSaturation();
 
   EXPECT_TRUE(manager->EndQuery(query, kSubmitCount));
   EXPECT_FALSE(query->IsPending());
 
   EXPECT_EQ(static_cast<GLuint>(GL_INVALID_ENUM), sync->result);
 
   manager->Destroy(false);
 }
 
+TEST_F(QueryManagerTest, OcclusionQuery) {
+  const GLuint kClient1Id = 1;
+  const GLuint kService1Id = 11;
+  const GLenum kTarget = GL_SAMPLES_PASSED_ARB;
+  const base::subtle::Atomic32 kSubmitCount = 123;
+
+  TestHelper::SetupFeatureInfoInitExpectations(
+      gl_.get(),
+      "GL_ARB_occlusion_query");
+  scoped_refptr<FeatureInfo> feature_info(new FeatureInfo());
+  feature_info->InitializeForTesting();
+  std::unique_ptr<QueryManager> manager(
+      new QueryManager(decoder_.get(), feature_info.get()));
+
+  EXPECT_CALL(*gl_, GenQueries(1, _))
+      .WillOnce(SetArgumentPointee<1>(kService1Id))
+      .RetiresOnSaturation();
+  QueryManager::Query* query = manager->CreateQuery(
+      kTarget, kClient1Id, kSharedMemoryId, kSharedMemoryOffset);
+  ASSERT_TRUE(query != NULL);
+
+  EXPECT_CALL(*gl_, BeginQuery(GL_SAMPLES_PASSED_ARB, kService1Id))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_CALL(*gl_, EndQuery(GL_SAMPLES_PASSED_ARB))
+      .Times(1)
+      .RetiresOnSaturation();
+  EXPECT_TRUE(manager->BeginQuery(query));
+  EXPECT_TRUE(manager->EndQuery(query, kSubmitCount));
+  manager->Destroy(false);
+}
+
 }  // namespace gles2
 }  // namespace gpu