Rework security checks to be based on Window rather than Frame.

third_party/WebKit/Source/bindings/core/v8/V8DOMWrapper.cpp

Index: third_party/WebKit/Source/bindings/core/v8/V8DOMWrapper.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8DOMWrapper.cpp b/third_party/WebKit/Source/bindings/core/v8/V8DOMWrapper.cpp
index e54c2acf6f2f81002f2fe5dd3640bf024dbe2a32..59f5677559acbf7235778ede262e3bf6aee9c904 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8DOMWrapper.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8DOMWrapper.cpp
@@ -119,9 +119,10 @@ void V8WrapperInstantiationScope::securityCheck(
     // reach this code path. Should be generalized.
     ExceptionState exceptionState(isolate, ExceptionState::ConstructionContext,
                                   "Location");
-    if (BindingSecurity::shouldAllowAccessToDetachedWindow(
-            callingWindow, targetWindow, exceptionState))
+    if (BindingSecurity::shouldAllowAccessTo(callingWindow, targetWindow,
+                                             exceptionState)) {
       return;
+    }
 
     CHECK_EQ(SecurityError, exceptionState.code());
     return;