Move PathExists to base namespace.

base/file_util.h

Index: base/file_util.h
diff --git a/base/file_util.h b/base/file_util.h
index 321070fd84a1b343410b0790a89fe1430959cb7e..095734bdc8ff2247045f7fbd1f88d122765b2e4f 100644
--- a/base/file_util.h
+++ b/base/file_util.h
@@ -112,16 +112,16 @@ BASE_EXPORT bool CopyDirectory(const FilePath& from_path,
                                const FilePath& to_path,
                                bool recursive);
 
+// Returns true if the given path exists on the local filesystem,
+// false otherwise.
+BASE_EXPORT bool PathExists(const FilePath& path);
+
 }  // namespace base
 
 // -----------------------------------------------------------------------------
 
 namespace file_util {
 
-// Returns true if the given path exists on the local filesystem,
-// false otherwise.
-BASE_EXPORT bool PathExists(const base::FilePath& path);
-
 // Returns true if the given path is writable by the user, false otherwise.
 BASE_EXPORT bool PathIsWritable(const base::FilePath& path);