Move PathExists to base namespace.

chrome/browser/sync/profile_sync_service_unittest.cc

Index: chrome/browser/sync/profile_sync_service_unittest.cc
diff --git a/chrome/browser/sync/profile_sync_service_unittest.cc b/chrome/browser/sync/profile_sync_service_unittest.cc
index 4eec093cc170aea377c151fe3239759553cf02ea..c2574497797b09a71f42bd057ee4241ccb0002b4 100644
--- a/chrome/browser/sync/profile_sync_service_unittest.cc
+++ b/chrome/browser/sync/profile_sync_service_unittest.cc
@@ -433,11 +433,11 @@ TEST_F(ProfileSyncServiceTest, TestStartupWithOldSyncData) {
   harness_.service.reset();
 
   // This file should have been deleted when the whole directory was nuked.
-  ASSERT_FALSE(file_util::PathExists(sync_file3));
-  ASSERT_FALSE(file_util::PathExists(sync_file1));
+  ASSERT_FALSE(base::PathExists(sync_file3));
+  ASSERT_FALSE(base::PathExists(sync_file1));
 
   // This will still exist, but the text should have changed.
-  ASSERT_TRUE(file_util::PathExists(sync_file2));
+  ASSERT_TRUE(base::PathExists(sync_file2));
   std::string file2text;
   ASSERT_TRUE(file_util::ReadFileToString(sync_file2, &file2text));
   ASSERT_NE(file2text.compare(nonsense2), 0);