Fix and enable Transport API test.

chrome/test/ui/ppapi_uitest.cc

 // Copyright (c) 2011 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 "base/file_util.h"
 #include "base/path_service.h"
 #include "base/test/test_timeouts.h"
 #include "build/build_config.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/test/automation/tab_proxy.h"
@@ skipping 35 matching lines @@
     launch_arguments_.AppendSwitch(switches::kEnableFileCookies);
 
     // Some stuff is hung off of the testing interface which is not enabled
     // by default.
     launch_arguments_.AppendSwitch(switches::kEnablePepperTesting);
 
     // Give unlimited quota for files to Pepper tests.
     // TODO(dumi): remove this switch once we have a quota management
     // system in place.
     launch_arguments_.AppendSwitch(switches::kUnlimitedQuotaForFiles);
+
+#if defined(ENABLE_P2P_APIS)
+    // Enable P2P API.
+    launch_arguments_.AppendSwitch(switches::kEnableP2PApi);
+#endif // ENABLE_P2P_APIS
   }
 
   void RunTest(const std::string& test_case) {
     FilePath test_path;
     PathService::Get(base::DIR_SOURCE_ROOT, &test_path);
     test_path = test_path.Append(FILE_PATH_LITERAL("ppapi"));
     test_path = test_path.Append(FILE_PATH_LITERAL("tests"));
     test_path = test_path.Append(FILE_PATH_LITERAL("test_case.html"));
 
     // Sanity check the file name.
@@ skipping 96 matching lines @@
 
 TEST_F(PPAPITest, FileRef) {
   RunTestViaHTTP("FileRef");
 }
 
 // http://crbug.com/63239
 TEST_F(PPAPITest, DISABLED_DirectoryReader) {
   RunTestViaHTTP("DirectoryReader");
 }
 
-// http://crbug.com/83395
-TEST_F(PPAPITest, DISABLED_Transport) {
+#if defined(ENABLE_P2P_APIS)
+TEST_F(PPAPITest, Transport) {
   RunTest("Transport");
 }
+#endif // ENABLE_P2P_APIS