PPAPI: Add permissions checking for PPB_NetworkProxy

ppapi/tests/test_network_proxy.cc

 // 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.
 
 #include "ppapi/tests/test_network_proxy.h"
 
 #include "ppapi/cpp/dev/network_proxy_dev.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/var.h"
 #include "ppapi/tests/testing_instance.h"
@@ skipping 41 matching lines @@
   output = callback.output();
   ASSERT_TRUE(output.is_string());
   // Should get "DIRECT" for file:// URLs.
   ASSERT_EQ("DIRECT", output.AsString());
 
   callback.WaitForResult(
       pp::NetworkProxy::GetProxyForURL(instance_,
                                        pp::Var("this isn't a url"),
                                        callback.GetCallback()));
   CHECK_CALLBACK_BEHAVIOR(callback);
-  // TODO(dmichael): Use bad address when it's available.
   ASSERT_EQ(PP_ERROR_BADARGUMENT, callback.result());
   // TODO(dmichael): Add this check below when crbug.com/250046 is fixed.
   // ASSERT_TRUE(callback.output().is_undefined());
 
   callback.WaitForResult(
       pp::NetworkProxy::GetProxyForURL(instance_,
                                        pp::Var(42), // non-string Var
                                        callback.GetCallback()));
   CHECK_CALLBACK_BEHAVIOR(callback);
   ASSERT_EQ(PP_ERROR_BADARGUMENT, callback.result());
   // TODO(dmichael): Add this check below when crbug.com/250046 is fixed.
   // ASSERT_TRUE(callback.output().is_undefined());
 
   PASS();
 }