Implement TransformFeedbackManager in GPU command buffer.

gpu/command_buffer/service/transform_feedback_manager_unittest.cc

+// Copyright (c) 2016 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/gpu_service_test.h"
+#include "gpu/command_buffer/service/test_helper.h"
+#include "gpu/command_buffer/service/transform_feedback_manager.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gl/gl_mock.h"
+
+using ::testing::_;
+
+namespace gpu {
+namespace gles2 {
+
+namespace {
+const GLuint kTransformFeedbackClientId = 76;
+const GLuint kTransformFeedbackServiceId = 1076;
+}  // anonymous
+
+class TransformFeedbackManagerTest : public GpuServiceTest {
+ public:
+  TransformFeedbackManagerTest() {
+  }
+
+  ~TransformFeedbackManagerTest() override {}
+
+ protected:
+  void SetUp() override {
+    const GLuint kMaxTransformFeedbackSeparateAttribs = 16;
+    GpuServiceTest::SetUpWithGLVersion("4.1", "");
+    manager_.reset(new TransformFeedbackManager(
+        kMaxTransformFeedbackSeparateAttribs, true));
+  }
+
+  void TearDown() override {
+    manager_.reset();
+    GpuServiceTest::TearDown();
+  }
+
+  std::unique_ptr<TransformFeedbackManager> manager_;
+};
+
+TEST_F(TransformFeedbackManagerTest, LifeTime) {
+  manager_->CreateTransformFeedback(
+      kTransformFeedbackClientId, kTransformFeedbackServiceId);
+  scoped_refptr<TransformFeedback> transform_feedback =
+      manager_->GetTransformFeedback(kTransformFeedbackClientId);
+  EXPECT_TRUE(transform_feedback.get());
+
+  manager_->RemoveTransformFeedback(kTransformFeedbackClientId);
+  EXPECT_FALSE(manager_->GetTransformFeedback(kTransformFeedbackClientId));
+
+  EXPECT_CALL(*gl_, DeleteTransformFeedbacks(1, _))
+      .Times(1)
+      .RetiresOnSaturation();
+  transform_feedback = nullptr;
+}
+
+}  // namespace gles2
+}  // namespace gpu
+
+