Rewrite how RemoteFrameOwners retain life.

third_party/WebKit/Source/web/RemoteBridgeFrameOwner.h

-// 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.
-
-#ifndef RemoteBridgeFrameOwner_h
-#define RemoteBridgeFrameOwner_h
-
-#include "core/frame/FrameOwner.h"
-#include "platform/scroll/ScrollTypes.h"
-#include "public/web/WebFrameOwnerProperties.h"
-
-namespace blink {
-
-// Helper class to bridge communication for a frame with a remote parent.
-// Currently, it serves two purposes:
-// 1. Allows the local frame's loader to retrieve sandbox flags associated with
-//    its owner element in another process.
-// 2. Trigger a load event on its owner element once it finishes a load.
-class RemoteBridgeFrameOwner final : public NoBaseWillBeGarbageCollectedFinalized<RemoteBridgeFrameOwner>, public FrameOwner {
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(RemoteBridgeFrameOwner);
-public:
-    static PassOwnPtrWillBeRawPtr<RemoteBridgeFrameOwner> create(SandboxFlags flags, const WebFrameOwnerProperties& frameOwnerProperties)
-    {
-        return adoptPtrWillBeNoop(new RemoteBridgeFrameOwner(flags, frameOwnerProperties));
-    }
-
-    // FrameOwner overrides:
-    bool isLocal() const override { return false; }
-    void setContentFrame(Frame&) override;
-    void clearContentFrame() override;
-    SandboxFlags getSandboxFlags() const override { return m_sandboxFlags; }
-    void setSandboxFlags(SandboxFlags flags) { m_sandboxFlags = flags; }
-    void dispatchLoad() override;
-    // TODO(dcheng): Implement.
-    void renderFallbackContent() override { }
-    ScrollbarMode scrollingMode() const override { return m_scrolling; }
-    int marginWidth() const override { return m_marginWidth; }
-    int marginHeight() const override { return m_marginHeight; }
-
-    void setScrollingMode(WebFrameOwnerProperties::ScrollingMode);
-    void setMarginWidth(int marginWidth) { m_marginWidth = marginWidth; }
-    void setMarginHeight(int marginHeight) { m_marginHeight = marginHeight; }
-
-    DECLARE_VIRTUAL_TRACE();
-
-private:
-    RemoteBridgeFrameOwner(SandboxFlags, const WebFrameOwnerProperties&);
-
-    RawPtrWillBeMember<Frame> m_frame;
-    SandboxFlags m_sandboxFlags;
-    ScrollbarMode m_scrolling;
-    int m_marginWidth;
-    int m_marginHeight;
-};
-
-DEFINE_TYPE_CASTS(RemoteBridgeFrameOwner, FrameOwner, owner, !owner->isLocal(), !owner.isLocal());
-
-} // namespace blink
-
-#endif // RemoteBridgeFrameOwner_h