Adding checks for V8 functions returning Maybe<bool>

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 a8d4be011e9c99e2e3dd5ae22c0b877b6ee463d1..52afae9c422039e7c1258fad9793807969102c83 100644
--- a/third_party/WebKit/Source/bindings/core/v8/WindowProxy.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/WindowProxy.cpp
@@ -533,7 +533,9 @@ void WindowProxy::namedItemAdded(HTMLDocument* document, const AtomicString& nam
     v8::Local<v8::Context> context = m_scriptState->context();
     v8::Local<v8::Object> documentHandle = m_document.newLocal(m_isolate);
     checkDocumentWrapper(documentHandle, document);
-    documentHandle->SetAccessor(context, v8String(m_isolate, name), getter);
+    if (documentHandle->SetAccessor(context, v8String(m_isolate, name), getter).IsNothing()) {
+        // TODO: What action, if any, should be taken here?
+    }
 }
 
 void WindowProxy::namedItemRemoved(HTMLDocument* document, const AtomicString& name)
@@ -550,7 +552,9 @@ void WindowProxy::namedItemRemoved(HTMLDocument* document, const AtomicString& n
     ASSERT(!m_document.isEmpty());
     v8::Local<v8::Object> documentHandle = m_document.newLocal(m_isolate);
     checkDocumentWrapper(documentHandle, document);
-    documentHandle->Delete(m_isolate->GetCurrentContext(), v8String(m_isolate, name));
+    if (documentHandle->Delete(m_isolate->GetCurrentContext(), v8String(m_isolate, name)).IsNothing()) {
+        // TODO: What action, if any, should be taken here?
+    }
 }
 
 void WindowProxy::updateSecurityOrigin(SecurityOrigin* origin)