Revert of Extract WebGraphicsContext3DImpl from webkit/common/gpu.

gpu/blink/gpu_blink_export.h

Index: gpu/blink/gpu_blink_export.h
diff --git a/gpu/blink/gpu_blink_export.h b/gpu/blink/gpu_blink_export.h
deleted file mode 100644
index 37878a39dab214fadfd0b1a61466f20ce998bde9..0000000000000000000000000000000000000000
--- a/gpu/blink/gpu_blink_export.h
+++ /dev/null
@@ -1,34 +0,0 @@
-// Copyright 2014 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 GPU_BLINK_GPU_BLINK_EXPORT_H_
-#define GPU_BLINK_GPU_BLINK_EXPORT_H_
-
-#if defined(COMPONENT_BUILD)
-
-#if defined(WIN32)
-
-#if defined(GPU_BLINK_IMPLEMENTATION)
-#define GPU_BLINK_EXPORT __declspec(dllexport)
-#else
-#define GPU_BLINK_EXPORT __declspec(dllimport)
-#endif  // defined(GPU_BLINK_IMPLEMENTATION)
-
-#else  // !defined(WIN32)
-
-#if defined(GPU_BLINK_IMPLEMENTATION)
-#define GPU_BLINK_EXPORT __attribute__((visibility("default")))
-#else
-#define GPU_BLINK_EXPORT
-#endif  // defined(GPU_BLINK_IMPLEMENTATION)
-
-#endif  // defined(WIN32)
-
-#else  // !defined(COMPONENT_BUILD)
-
-#define GPU_BLINK_EXPORT
-
-#endif  // defined(COMPONENT_BUILD)
-
-#endif  // GPU_BLINK_GPU_BLINK_EXPORT_H_