Fix out-of-memory crashes related to ArrayBuffer allocation

third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp

Index: third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp
diff --git a/third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp b/third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp
index b0eac25048166a6f8fd985eb8faf036437307aca..34c9bc6888691ae9ca85abef4bee4a5d2f15fd06 100644
--- a/third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp
+++ b/third_party/WebKit/Source/web/ServiceWorkerGlobalScopeProxy.cpp
@@ -151,8 +151,13 @@ void ServiceWorkerGlobalScopeProxy::dispatchPushEvent(int eventID, const WebStri
 {
     ASSERT(m_workerGlobalScope);
     WaitUntilObserver* observer = WaitUntilObserver::create(m_workerGlobalScope, WaitUntilObserver::Push, eventID);
-    RefPtrWillBeRawPtr<Event> event(PushEvent::create(EventTypeNames::push, PushMessageData::create(data), observer));
-    m_workerGlobalScope->dispatchExtendableEvent(event.release(), observer);
+    NonThrowableExceptionState exceptionState;
+    PushMessageData* messageData = PushMessageData::create(data, exceptionState);
+    // Fail silently by dropping the event when the allocation of PushMessageData fails (out of memory), which results in an exception
+    if (!exceptionState.hadException()) {
+        RefPtrWillBeRawPtr<Event> event(PushEvent::create(EventTypeNames::push, messageData, observer));
+        m_workerGlobalScope->dispatchExtendableEvent(event.release(), observer);
+    }
 }
 
 void ServiceWorkerGlobalScopeProxy::dispatchServicePortConnectEvent(WebServicePortConnectEventCallbacks* rawCallbacks, const WebURL& targetURL, const WebString& origin, WebServicePortID portID)