[inspector] introduced exceptionThrown support in test runner

test/inspector/runtime/exception-thrown.js

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+print("Check that exceptionThrown is supported by test runner.")
+
+Protocol.Runtime.enable();
+Protocol.Runtime.onExceptionThrown(message => InspectorTest.logMessage(message));
+Protocol.Runtime.evaluate({ expression: "setTimeout(() => { \n  throw new Error() }, 0)" });
+Protocol.Runtime.evaluate({ expression: "setTimeout(\" }\", 0)" });
+Protocol.Runtime.evaluate({ expression: "setTimeout(() => { \n  throw 239; }, 0)" });
+InspectorTest.completeTestAfterPendingTimeouts();