Prepare to replicate sandbox flags for OOPIF

public/web/WebRemoteFrame.h

Index: public/web/WebRemoteFrame.h
diff --git a/public/web/WebRemoteFrame.h b/public/web/WebRemoteFrame.h
index 480b7d6e09b947611053f0dd71947ac4ee860076..c81164e326ce7b282907e10562ecb31bbe2f9b2f 100644
--- a/public/web/WebRemoteFrame.h
+++ b/public/web/WebRemoteFrame.h
@@ -6,6 +6,7 @@
 #define WebRemoteFrame_h
 
 #include "public/web/WebFrame.h"
+#include "public/web/WebSandboxFlags.h"
 
 namespace blink {
 
@@ -16,15 +17,20 @@ class WebRemoteFrame : public WebFrame {
 public:
     BLINK_EXPORT static WebRemoteFrame* create(WebRemoteFrameClient*);
 
+    // FIXME(alexmos): This will go away once the Chromium side is updated to pass sandbox flags.
     virtual WebLocalFrame* createLocalChild(const WebString& name, WebFrameClient*) = 0;
+    virtual WebLocalFrame* createLocalChild(const WebString& name, WebSandboxFlags, WebFrameClient*) = 0;
     virtual WebRemoteFrame* createRemoteChild(const WebString& name, WebRemoteFrameClient*) = 0;
 
     // Transfer initial drawing parameters from a local frame.
     virtual void initializeFromFrame(WebLocalFrame*) const = 0;
 
-    // Set security origin replicated from another process
+    // Set security origin replicated from another process.
     virtual void setReplicatedOrigin(const WebSecurityOrigin&) const = 0;
 
+    // Set sandbox flags replicated from another process.
+    virtual void setReplicatedSandboxFlags(WebSandboxFlags) const = 0;
+
     virtual void didStartLoading() = 0;
     virtual void didStopLoading() = 0;
 };