Move path functions from file_util to FilePath object.

base/file_util.h

Index: base/file_util.h
diff --git a/base/file_util.h b/base/file_util.h
index bd4b33d3eae5a87a5e0b75e6d9ab5f2223a51d3b..564005929ce8c6ddb9c6733f611b54b85ccd3fe7 100644
--- a/base/file_util.h
+++ b/base/file_util.h
@@ -46,25 +46,6 @@ namespace file_util {
 extern bool g_bug108724_debug;
 
 //-----------------------------------------------------------------------------
-// Functions that operate purely on a path string w/o touching the filesystem:
-
-// Returns true if the given path ends with a path separator character.
-BASE_EXPORT bool EndsWithSeparator(const base::FilePath& path);
-
-// Makes sure that |path| ends with a separator IFF path is a directory that
-// exists. Returns true if |path| is an existing directory, false otherwise.
-BASE_EXPORT bool EnsureEndsWithSeparator(base::FilePath* path);
-
-// Convert provided relative path into an absolute path.  Returns false on
-// error. On POSIX, this function fails if the path does not exist.
-BASE_EXPORT bool AbsolutePath(base::FilePath* path);
-
-// Returns true if |parent| contains |child|. Both paths are converted to
-// absolute paths before doing the comparison.
-BASE_EXPORT bool ContainsPath(const base::FilePath& parent,
-                              const base::FilePath& child);
-
-//-----------------------------------------------------------------------------
 // Functions that involve filesystem access or modification:
 
 // Returns the number of files matching the current path that were