Prepare to replicate sandbox flags for OOPIF

Source/web/WebRemoteFrameImpl.h

Index: Source/web/WebRemoteFrameImpl.h
diff --git a/Source/web/WebRemoteFrameImpl.h b/Source/web/WebRemoteFrameImpl.h
index 34f8afa6ede184643bea5d4e278913dfb268a7c8..fc28abfa4a89bb5191fddc5d2253a38ed20be47f 100644
--- a/Source/web/WebRemoteFrameImpl.h
+++ b/Source/web/WebRemoteFrameImpl.h
@@ -184,7 +184,9 @@ public:
     virtual bool selectionStartHasSpellingMarkerFor(int from, int length) const override;
     virtual WebString layerTreeAsText(bool showDebugInfo = false) const override;
 
+    // FIXME(alexmos): This will go away once the Chromium side is updated to pass sandbox flags.
     virtual WebLocalFrame* createLocalChild(const WebString& name, WebFrameClient*) override;
+    virtual WebLocalFrame* createLocalChild(const WebString& name, WebSandboxFlags, WebFrameClient*) override;
     virtual WebRemoteFrame* createRemoteChild(const WebString& name, WebRemoteFrameClient*) override;
 
     void initializeCoreFrame(FrameHost*, FrameOwner*, const AtomicString& name);
@@ -199,6 +201,8 @@ public:
     virtual void initializeFromFrame(WebLocalFrame*) const override;
 
     virtual void setReplicatedOrigin(const WebSecurityOrigin&) const override;
+    virtual void setReplicatedSandboxFlags(WebSandboxFlags) const override;
+
     void didStartLoading() override;
     void didStopLoading() override;