Add ui devtools server

ui/devtools/StringUtil.cc

Index: ui/devtools/StringUtil.cc
diff --git a/ui/devtools/StringUtil.cc b/ui/devtools/StringUtil.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ac51e567ea40421954cab2bd262b7614423083a8
--- /dev/null
+++ b/ui/devtools/StringUtil.cc
@@ -0,0 +1,20 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/devtools/StringUtil.h"
+
+#include "ui/devtools/Protocol.h"
+
+namespace ui {
+namespace devtools {
+namespace protocol {
+
+std::unique_ptr<Value> parseJSON(const String& string) {
+  return parseJSON(reinterpret_cast<const uint8_t*>(&string[0]),
+                   string.length());
+};
+
+}  // namespace protocol
+}  // namespace ws
+}  // namespace ui