Merge 95689 - [Chromium] Protect message ports from being deleted in V8MessageEvent::portsAccesso...

Source/WebCore/bindings/v8/custom/V8MessageEventCustom.cpp

Index: Source/WebCore/bindings/v8/custom/V8MessageEventCustom.cpp
===================================================================
--- Source/WebCore/bindings/v8/custom/V8MessageEventCustom.cpp	(revision 95974)
+++ Source/WebCore/bindings/v8/custom/V8MessageEventCustom.cpp	(working copy)
@@ -50,10 +50,12 @@
     MessagePortArray* ports = event->ports();
     if (!ports || ports->isEmpty())
         return v8::Null();
+    
+    MessagePortArray portsCopy(*ports);
 
-    v8::Local<v8::Array> portArray = v8::Array::New(ports->size());
-    for (size_t i = 0; i < ports->size(); ++i)
-        portArray->Set(v8::Integer::New(i), toV8((*ports)[i].get()));
+    v8::Local<v8::Array> portArray = v8::Array::New(portsCopy.size());
+    for (size_t i = 0; i < portsCopy.size(); ++i)
+        portArray->Set(v8::Integer::New(i), toV8(portsCopy[i].get()));
 
     return portArray;
 }