PPAPI: Introduce PPB_NetworkProxy_Dev

ppapi/api/dev/ppb_network_proxy_dev.idl

+/* Copyright (c) 2013 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.
+ */
+
+/**
+ * This file defines the <code>PPB_NetworkProxy_Dev</code> interface.
+ */
+
+[generate_thunk]
+
+label Chrome {
+  M29 = 0.1
+};
+
+[singleton]
+interface PPB_NetworkProxy_Dev {
+  /**
+   * Retrieves the proxy that will be used for the given URL. The result will
+   * be a string in PAC format. For more details about PAC format, please see
+   * http://en.wikipedia.org/wiki/Proxy_auto-config
+   */
+  int32_t GetProxyForURL([in] PP_Instance instance,
+                         [in] PP_Var url,
+                         [out] PP_Var proxy_string,
+                         [in] PP_CompletionCallback callback);
+};