Reapply 61613 that was reverted for false valgrind alarm.

webkit/fileapi/file_system_operation.h

Index: webkit/fileapi/file_system_operation.h
diff --git a/webkit/fileapi/file_system_operation.h b/webkit/fileapi/file_system_operation.h
index ab6d56ca400cf3b0e2a4c3c00e369e9b28b1ec8a..ba65b7d5020dfdf2536b8495bbebada199db9426 100644
--- a/webkit/fileapi/file_system_operation.h
+++ b/webkit/fileapi/file_system_operation.h
@@ -45,9 +45,6 @@ class FileSystemOperation {
   void Copy(const FilePath& src_path,
             const FilePath& dest_path);
 
-  // If |dest_path| exists and is a directory, behavior is unspecified or
-  // varies for different platforms. TODO(kkanetkar): Fix this as per spec
-  // when it is addressed in spec.
   void Move(const FilePath& src_path,
             const FilePath& dest_path);
 
@@ -59,7 +56,7 @@ class FileSystemOperation {
 
   void ReadDirectory(const FilePath& path);
 
-  void Remove(const FilePath& path);
+  void Remove(const FilePath& path, bool recursive);
 
   void Write(const FilePath& path, const GURL& blob_url, int64 offset);