Oilpan: eagerly finalize WebGLRenderingContext objects.

Source/core/html/canvas/WebGLSharedWebGraphicsContext3D.cpp

-// 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.
-
-#include "config.h"
-#include "core/html/canvas/WebGLSharedWebGraphicsContext3D.h"
-
-#if ENABLE(OILPAN)
-#include "platform/graphics/gpu/DrawingBuffer.h"
-#include "public/platform/WebGraphicsContext3D.h"
-
-namespace blink {
-
-PassRefPtr<WebGLSharedWebGraphicsContext3D> WebGLSharedWebGraphicsContext3D::create(PassRefPtr<DrawingBuffer> buffer)
-{
-    return adoptRef(new WebGLSharedWebGraphicsContext3D(buffer));
-}
-
-WebGLSharedWebGraphicsContext3D::WebGLSharedWebGraphicsContext3D(PassRefPtr<DrawingBuffer> buffer)
-    : m_buffer(buffer)
-{
-}
-
-WebGLSharedWebGraphicsContext3D::~WebGLSharedWebGraphicsContext3D()
-{
-    dispose();
-}
-
-void WebGLSharedWebGraphicsContext3D::dispose()
-{
-    if (m_buffer) {
-        m_buffer->beginDestruction();
-        m_buffer.clear();
-    }
-}
-
-void WebGLSharedWebGraphicsContext3D::update(PassRefPtr<DrawingBuffer> buffer)
-{
-    m_buffer = buffer;
-}
-
-DrawingBuffer* WebGLSharedWebGraphicsContext3D::drawingBuffer() const
-{
-    return m_buffer.get();
-}
-
-WebGraphicsContext3D* WebGLSharedWebGraphicsContext3D::webContext() const
-{
-    return m_buffer ? m_buffer->context() : 0;
-}
-
-} // namespace blink
-
-#endif // ENABLE(OILPAN)