Rewrite how RemoteFrameOwners retain life.

third_party/WebKit/Source/core/frame/FrameOwner.h

 // 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 FrameOwner_h
 #define FrameOwner_h
 
 #include "core/CoreExport.h"
 #include "core/dom/SandboxFlags.h"
 #include "platform/heap/Handle.h"
 #include "platform/scroll/ScrollTypes.h"
 
 namespace blink {
 
 class Frame;
 
 // Oilpan: all FrameOwner instances are GCed objects. FrameOwner additionally
 // derives from GarbageCollectedMixin so that Member<FrameOwner> references can
 // be kept (e.g., Frame::m_owner.)
 class CORE_EXPORT FrameOwner : public WillBeGarbageCollectedMixin {
 public:
     virtual ~FrameOwner() { }
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 
     virtual bool isLocal() const = 0;
+    virtual bool isRemote() const = 0;

[dcheng, 2016/03/16 21:15:04]

I went through and audited all existing calls (that I could find) to isLocal()
and flipped them to use isRemote() if appropriate.

 
     virtual void setContentFrame(Frame&) = 0;
     virtual void clearContentFrame() = 0;
 
     virtual SandboxFlags getSandboxFlags() const = 0;
     virtual void dispatchLoad() = 0;
 
     // On load failure, a frame can ask its owner to render fallback content
     // which replaces the frame contents.
     virtual void renderFallbackContent() = 0;
 
     virtual ScrollbarMode scrollingMode() const = 0;
     virtual int marginWidth() const = 0;
     virtual int marginHeight() const = 0;
 };
 
 class CORE_EXPORT DummyFrameOwner : public NoBaseWillBeGarbageCollectedFinalized<DummyFrameOwner>, public FrameOwner {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DummyFrameOwner);
 public:
     static PassOwnPtrWillBeRawPtr<DummyFrameOwner> create()
     {
         return adoptPtrWillBeNoop(new DummyFrameOwner);
     }
 
     DEFINE_INLINE_VIRTUAL_TRACE() { FrameOwner::trace(visitor); }
 
     // FrameOwner overrides:
     bool isLocal() const override { return false; }
+    bool isRemote() const override { return false; }
     void setContentFrame(Frame&) override { }
     void clearContentFrame() override { }
     SandboxFlags getSandboxFlags() const override { return SandboxNone; }
     void dispatchLoad() override { }
     void renderFallbackContent() override { }
     ScrollbarMode scrollingMode() const override { return ScrollbarAuto; }
     int marginWidth() const override { return -1; }
     int marginHeight() const override { return -1; }
 };
 
 } // namespace blink
 
 #endif // FrameOwner_h