Revert of media: Optimize HW Video to 2D Canvas copy.

media/filters/context_3d.h

-// Copyright (c) 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 MEDIA_FILTERS_CONTEXT_3D_H_
-#define MEDIA_FILTERS_CONTEXT_3D_H_
-
-class GrContext;
-
-namespace gpu {
-namespace gles2 {
-class GLES2Interface;
-}
-}
-
-namespace media {
-
-// This struct can be used to make media use gpu::gles2::GLES2Interface and
-// GrContext.
-// Usage:
-// gpu::gles2::GLES2Interface* gl = ...;
-// GrContext* gr_context = ...;
-// Context3D context_3d(gl, gr_context);
-
-struct Context3D {
-  Context3D() : gl(nullptr), gr_context(nullptr) {}
-  Context3D(gpu::gles2::GLES2Interface* gl_, class GrContext* gr_context_)
-      : gl(gl_), gr_context(gr_context_) {}
-
-  gpu::gles2::GLES2Interface* gl;
-  class GrContext* gr_context;
-};
-
-}  // namespace media
-
-#endif  // MEDIA_FILTERS_CONTEXT_3D_H_