PPAPI: Add permissions checking for PPB_NetworkProxy

ppapi/tests/test_network_proxy.cc

Index: ppapi/tests/test_network_proxy.cc
diff --git a/ppapi/tests/test_network_proxy.cc b/ppapi/tests/test_network_proxy.cc
index 4eb41498f6d33d4df408169f47b32aeb8fe81e62..c372985819d2aa5f81f8c6eeb3d5ab441a090c10 100644
--- a/ppapi/tests/test_network_proxy.cc
+++ b/ppapi/tests/test_network_proxy.cc
@@ -59,7 +59,6 @@ std::string TestNetworkProxy::TestGetProxyForURL() {
                                        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());