Move more file_util functions to base namespace.

This moves DevicePathToDriveLetterPath, NormalizeToNativeFilePath, IsLink, and GetFileInfo.

This also removes some explicit "base::" usage in base files I touched.

TBR=jam

Review URL: https://codereview.chromium.org/105293002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238763 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 9eae4e686d49213ee7dba24cdf28f13d38b99741
diff --git a/base/files/file_util_proxy.cc b/base/files/file_util_proxy.cc
index a36328e..eefb7a1 100644
--- a/base/files/file_util_proxy.cc
+++ b/base/files/file_util_proxy.cc
@@ -111,7 +111,7 @@
       error_ = PLATFORM_FILE_ERROR_NOT_FOUND;
       return;
     }
-    if (!file_util::GetFileInfo(file_path, &file_info_))
+    if (!GetFileInfo(file_path, &file_info_))
       error_ = PLATFORM_FILE_ERROR_FAILED;
   }