Prepare to replicate sandbox flags for OOPIF

Source/core/dom/ExecutionContext.cpp

Index: Source/core/dom/ExecutionContext.cpp
diff --git a/Source/core/dom/ExecutionContext.cpp b/Source/core/dom/ExecutionContext.cpp
index a34b6d1cc484fe70cb1790f107189f75ed775e09..46d596330538f5ac9fc9e967de5a1e1ea77c2676 100644
--- a/Source/core/dom/ExecutionContext.cpp
+++ b/Source/core/dom/ExecutionContext.cpp
@@ -68,8 +68,7 @@ public:
 };
 
 ExecutionContext::ExecutionContext()
-    : m_sandboxFlags(SandboxNone)
-    , m_circularSequentialID(0)
+    : m_circularSequentialID(0)
     , m_timerNestingLevel(0)
     , m_inDispatchErrorEvent(false)
     , m_activeDOMObjectsAreSuspended(false)
@@ -263,17 +262,6 @@ bool ExecutionContext::isIteratingOverObservers() const
     return m_lifecycleNotifier && m_lifecycleNotifier->isIteratingOverObservers();
 }
 
-void ExecutionContext::enforceSandboxFlags(SandboxFlags mask)
-{
-    m_sandboxFlags |= mask;
-
-    // The SandboxOrigin is stored redundantly in the security origin.
-    if (isSandboxed(SandboxOrigin) && securityContext().securityOrigin() && !securityContext().securityOrigin()->isUnique()) {
-        securityContext().setSecurityOrigin(SecurityOrigin::createUnique());
-        didUpdateSecurityOrigin();
-    }
-}
-
 void ExecutionContext::allowWindowFocus()
 {
     ++m_windowFocusTokens;