bindings: Use Maybe version of Call()

Source/bindings/core/v8/custom/V8CustomXPathNSResolver.cpp

 // Copyright (c) 2008, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 61 matching lines @@
     }
 
     // Catch exceptions from calling the namespace resolver.
     v8::TryCatch tryCatch;
     tryCatch.SetVerbose(true); // Print exceptions to console.
 
     const int argc = 1;
     v8::Local<v8::Value> argv[argc] = { v8String(m_isolate, prefix) };
     v8::Local<v8::Function> function = lookupNamespaceURIFunc.IsEmpty() ? v8::Local<v8::Function>::Cast(m_resolver) : lookupNamespaceURIFunc;
 
-    v8::Local<v8::Value> retval = ScriptController::callFunction(callingExecutionContext(m_isolate), function, m_resolver, argc, argv, m_isolate);
-
+    v8::Local<v8::Value> retval;
     // Eat exceptions from namespace resolver and return an empty string. This will most likely cause NamespaceError.
-    if (tryCatch.HasCaught())
+    if (!ScriptController::callFunction(callingExecutionContext(m_isolate), function, m_resolver, argc, argv, m_isolate).ToLocal(&retval))
         return nullAtom;
 
     TOSTRING_DEFAULT(V8StringResource<TreatNullAsNullString>, returnString, retval, nullAtom);
     return returnString;
 }
 
 DEFINE_TRACE(V8CustomXPathNSResolver)
 {
     XPathNSResolver::trace(visitor);
 }
 
 } // namespace blink