Move test-only stuff from cc/debug/ to cc/test

cc/debug/test_context_support.h

-// Copyright 2013 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.
-
-#ifndef CC_DEBUG_TEST_CONTEXT_SUPPORT_H_
-#define CC_DEBUG_TEST_CONTEXT_SUPPORT_H_
-
-#include <vector>
-
-#include "gpu/command_buffer/client/context_support.h"
-
-namespace cc {
-
-class TestContextSupport : public gpu::ContextSupport {
- public:
-  TestContextSupport();
-  virtual ~TestContextSupport();
-
-  // gpu::ContextSupport implementation.
-  virtual void SignalSyncPoint(uint32 sync_point,
-                               const base::Closure& callback) OVERRIDE;
-  virtual void SignalQuery(uint32 query,
-                           const base::Closure& callback) OVERRIDE;
-  virtual void SendManagedMemoryStats(const gpu::ManagedMemoryStats& stats)
-    OVERRIDE;
-
-  void CallAllSyncPointCallbacks();
-
- private:
-  std::vector<base::Closure> sync_point_callbacks_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestContextSupport);
-};
-
-}  // namespace cc
-
-#endif  // CC_DEBUG_TEST_CONTEXT_SUPPORT_H_