Move the rest of test_file_util to base namespace.

ipc/mojo/run_all_unittests.cc

 // Copyright 2014 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/at_exit.h"
 #include "base/bind.h"
 #include "base/test/launcher/unit_test_launcher.h"
 #include "base/test/test_suite.h"
 #include "mojo/embedder/embedder.h"
 
@@ skipping 14 matching lines @@
 int RunTestSuite(int argc, char** argv) {
   return NoAtExitBaseTestSuite(argc, argv).Run();
 }
 
 }  // namespace
 
 int main(int argc, char** argv) {
   mojo::embedder::Init();
 #if defined(OS_ANDROID)
   JNIEnv* env = base::android::AttachCurrentThread();
-  file_util::RegisterContentUriTestUtils(env);
+  base::RegisterContentUriTestUtils(env);
 #else
   base::AtExitManager at_exit;
 #endif
   return base::LaunchUnitTestsSerially(argc,
                                        argv,
                                        base::Bind(&RunTestSuite, argc, argv));
 }