Move PathExists to base namespace.

base/android/path_utils_unittest.cc

 // Copyright (c) 2012 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/android/path_utils.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 21 matching lines @@
   EXPECT_STREQ("/data/data/org.chromium.native_test/cache",
                path.value().c_str());
 }
 
 TEST_F(PathUtilsTest, TestGetNativeLibraryDirectory) {
   // The string comes from the Java side and depends on the APK
   // we are running in. Assumes that the directory contains
   // the base tests shared object.
   FilePath path;
   GetNativeLibraryDirectory(&path);
-  EXPECT_TRUE(file_util::PathExists(path.Append(("libbase_unittests.so"))));
+  EXPECT_TRUE(base::PathExists(path.Append(("libbase_unittests.so"))));
 }
 
 }  // namespace android
 }  // namespace base