Purge ImplementsThreadSafeReferenceCounting() from the codebase now that Task is dead.

gpu/command_buffer/client/share_group_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.
-
-// Tests for the ShareGroup.
-
-#include "gpu/command_buffer/client/share_group.h"
-
-#include "testing/gtest/include/gtest/gtest.h"
-#include "testing/gmock/include/gmock/gmock.h"
-
-namespace gpu {
-namespace gles2 {
-
-class ShareGroupTest : public testing::Test {
- protected:
-
-  virtual void SetUp() {
-    share_group_ = ShareGroup::Ref(new ShareGroup(false, false));
-  }
-
-  virtual void TearDown() {
-  }
-
-  scoped_refptr<ShareGroup> share_group_;
-};
-
-TEST_F(ShareGroupTest, Basic) {
-  EXPECT_TRUE(ShareGroup::ImplementsThreadSafeReferenceCounting());
-}
-
-}  // namespace gles2
-}  // namespace gpu
-
-