Rewrite how RemoteFrameOwners retain life.

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

Index: third_party/WebKit/Source/core/frame/FrameOwner.h
diff --git a/third_party/WebKit/Source/core/frame/FrameOwner.h b/third_party/WebKit/Source/core/frame/FrameOwner.h
index 4aa63f5cb14915775af4d577183f72e6ed4207da..c48bfbe3aa44340cb0c20bdf66f84534a0b585dc 100644
--- a/third_party/WebKit/Source/core/frame/FrameOwner.h
+++ b/third_party/WebKit/Source/core/frame/FrameOwner.h
@@ -23,6 +23,7 @@ public:
     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;
@@ -51,6 +52,7 @@ public:
 
     // 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; }