Rewrite how RemoteFrameOwners retain life.

third_party/WebKit/Source/web/RemoteBridgeFrameOwner.cpp

-// Copyright 2015 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 "web/RemoteBridgeFrameOwner.h"
-
-#include "core/frame/LocalFrame.h"
-#include "public/web/WebFrameClient.h"
-#include "web/WebLocalFrameImpl.h"
-
-namespace blink {
-
-RemoteBridgeFrameOwner::RemoteBridgeFrameOwner(SandboxFlags flags, const WebFrameOwnerProperties& frameOwnerProperties)
-    : m_sandboxFlags(flags)
-    , m_scrolling(static_cast<ScrollbarMode>(frameOwnerProperties.scrollingMode))
-    , m_marginWidth(frameOwnerProperties.marginWidth)
-    , m_marginHeight(frameOwnerProperties.marginHeight)
-{
-}
-
-DEFINE_TRACE(RemoteBridgeFrameOwner)
-{
-    visitor->trace(m_frame);
-    FrameOwner::trace(visitor);
-}
-
-void RemoteBridgeFrameOwner::setScrollingMode(WebFrameOwnerProperties::ScrollingMode mode)
-{
-    m_scrolling = static_cast<ScrollbarMode>(mode);
-}
-
-void RemoteBridgeFrameOwner::setContentFrame(Frame& frame)
-{
-    m_frame = &frame;
-}
-
-void RemoteBridgeFrameOwner::clearContentFrame()
-{
-    ASSERT(m_frame->owner() == this);
-    m_frame = nullptr;
-}
-
-void RemoteBridgeFrameOwner::dispatchLoad()
-{
-    WebLocalFrameImpl* webFrame = WebLocalFrameImpl::fromFrame(toLocalFrame(*m_frame));
-    webFrame->client()->dispatchLoad();
-}
-
-} // namespace blink