v8binding: Initializes WindowProxy iff it's uninitialized.

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 761b4a5c50260087de64d90bd90070998e813310..41f622d56314beea627d92fd40648d18562322ff 100644
--- a/third_party/WebKit/Source/bindings/core/v8/WindowProxy.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/WindowProxy.cpp
@@ -140,9 +140,8 @@ void WindowProxy::setGlobal(v8::Local<v8::Object> global) {
 // If there are JS code holds a closure to the old inner window,
 // it won't be able to reach the outer window via its global object.
 void WindowProxy::initializeIfNeeded() {
-  // TODO(haraken): It is wrong to re-initialize an already detached window
-  // proxy. This must be 'if(m_lifecycle == Lifecycle::ContextUninitialized)'.
-  if (m_lifecycle != Lifecycle::ContextInitialized) {
+  if (m_lifecycle == Lifecycle::ContextUninitialized ||
+      m_lifecycle == Lifecycle::GlobalObjectDetached) {
     initialize();
   }
 }