Move AppendFile and *CurrentDirectory to the base namespace.

This moves AppendFile, GetCurrentDirectory, and SetCurrentDirectory to the base namespace.

TBR=jam

Review URL: https://codereview.chromium.org/177923007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256309 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 37b3c199da23208121a946491ce749bafeb573c2
diff --git a/base/file_util_unittest.cc b/base/file_util_unittest.cc
index f360c7a..5b8684f 100644
--- a/base/file_util_unittest.cc
+++ b/base/file_util_unittest.cc
@@ -1947,11 +1947,11 @@
   FilePath foobar(data_dir.Append(FILE_PATH_LITERAL("foobar.txt")));
 
   std::string data("hello");
-  EXPECT_EQ(-1, file_util::AppendToFile(foobar, data.c_str(), data.length()));
+  EXPECT_EQ(-1, AppendToFile(foobar, data.c_str(), data.length()));
   EXPECT_EQ(static_cast<int>(data.length()),
             WriteFile(foobar, data.c_str(), data.length()));
   EXPECT_EQ(static_cast<int>(data.length()),
-            file_util::AppendToFile(foobar, data.c_str(), data.length()));
+            AppendToFile(foobar, data.c_str(), data.length()));
 
   const std::wstring read_content = ReadTextFile(foobar);
   EXPECT_EQ(L"hellohello", read_content);