binding: Removes |document| hidden value from the global object.

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

Index: third_party/WebKit/Source/bindings/core/v8/WindowProxy.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/WindowProxy.cpp b/third_party/WebKit/Source/bindings/core/v8/WindowProxy.cpp
index 319fe221e8a67018b0da6b53f4a3a6b953dd5123..0ad555276d7f6fdbcad626cc62538a9f75d264e6 100644
--- a/third_party/WebKit/Source/bindings/core/v8/WindowProxy.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/WindowProxy.cpp
@@ -411,11 +411,6 @@ void WindowProxy::updateDocumentProperty()
     // TODO(jochen): Don't replace the accessor with a data value. We need a way to tell v8 that the accessor's return value won't change after this point.
     if (!v8CallBoolean(context->Global()->ForceSet(context, v8AtomicString(m_isolate, "document"), documentWrapper, static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete))))
         return;
-
-    // We also stash a reference to the document on the inner global object so that
-    // LocalDOMWindow objects we obtain from JavaScript references are guaranteed to have
-    // live Document objects.
-    V8HiddenValue::setHiddenValue(m_scriptState.get(), v8::Local<v8::Object>::Cast(context->Global()->GetPrototype()), V8HiddenValue::document(m_isolate), documentWrapper);
 }
 
 void WindowProxy::updateActivityLogger()