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..cd0d96c9c92a9db5ec5c9c3ef3fbe2d64c31c62e 100644
--- a/ppapi/cpp/file_ref.h
+++ b/ppapi/cpp/file_ref.h
@@ -90,30 +90,27 @@ 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.
-  ///
+  /// MakeDirectory() makes a new directory in the file system as well as any
+  /// parent directories if the <code>make_ancestors</code> argument is
+  /// <code>true</code>.  It is not valid to make a directory in the external
+  /// file system.
+  ///
+  /// @param[in] exclusive A <code>bool</code> set to <code>true</code> to fail
+  /// if the directory already exists.
+  /// @param[in] make_ancestors A <code>bool</code> set to <code>true</code> to
+  /// make ancestor directories or <code>false</code> if ancestor directories
+  /// are not needed.
   /// @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
-  /// directory in the external file system.
-  ///
-  /// @param[in] cc A <code>CompletionCallback</code> to be called upon
-  /// completion of MakeDirectoryIncludingAncestors().
-  ///
-  /// @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);
+  /// Fails if the directory already exists and <code>exclusive</code> was
+  /// passed as <code>true</code>.  And also fails if ancestor directortories
+  /// do not exist and <code>make_ancestors</code> was passed as
+  /// <code>false</code>.
+  int32_t MakeDirectory(bool exclusive,
+                        bool make_ancestors,
+                        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.