PPAPI: Add new PPB_FileRef.MakeDirectory to support exclusive operation

ppapi/cpp/file_ref.h

Index: ppapi/cpp/file_ref.h
diff --git a/ppapi/cpp/file_ref.h b/ppapi/cpp/file_ref.h
index 452d2a61321866ba44ec2f70d3cf6b9db78417eb..9f9408830505e2d30b43fbe197c0061d04345b51 100644
--- a/ppapi/cpp/file_ref.h
+++ b/ppapi/cpp/file_ref.h
@@ -90,30 +90,20 @@ class FileRef : public Resource {
   /// <code>PP_FileSystemType_External</code>.
   FileRef GetParent() const;
 
-  /// MakeDirectory() makes a new directory in the file system.  It is not
-  /// valid to make a directory in the external file system.
-  /// <strong>Note:</strong> Use MakeDirectoryIncludingAncestors() to create
-  /// parent directories.
-  ///
-  /// @param[in] cc A <code>CompletionCallback</code> to be called upon
-  /// completion of MakeDirectory().
-  ///
-  /// @return An int32_t containing an error code from <code>pp_errors.h</code>.
-  /// Succeeds if the directory already exists. Fails if ancestor
-  /// directortories do not exist (see MakeDirectoryIncludingAncestors for the
-  /// alternative).
-  int32_t MakeDirectory(const CompletionCallback& cc);
-
-  /// MakeDirectoryIncludingAncestors() makes a new directory in the file
-  /// system as well as any parent directories. It is not valid to make a
+  /// MakeDirectory() makes a new directory in the file system according to the
+  /// given <code>make_directory_flags</code>, which is a bit-mask of the
+  /// <code>PP_MakeDirectoryFlags</code> values.  It is not valid to make a
   /// directory in the external file system.
   ///
+  /// @param[in] make_directory_flags A bit-mask of the
+  /// <code>PP_MakeDirectoryFlags</code> values.
+  /// See <code>ppb_file_ref.h</code> for more details.
   /// @param[in] cc A <code>CompletionCallback</code> to be called upon
-  /// completion of MakeDirectoryIncludingAncestors().
+  /// completion of MakeDirectory().
   ///
   /// @return An int32_t containing an error code from <code>pp_errors.h</code>.
-  /// Succeeds if the directory already exists.
-  int32_t MakeDirectoryIncludingAncestors(const CompletionCallback& cc);
+  int32_t MakeDirectory(int32_t make_directory_flags,
+                        const CompletionCallback& cc);
 
   /// Touch() Updates time stamps for a file.  You must have write access to the
   /// file if it exists in the external filesystem.