Reapply 61613 that was reverted for false valgrind alarm.

webkit/fileapi/file_system_operation.cc

Index: webkit/fileapi/file_system_operation.cc
diff --git a/webkit/fileapi/file_system_operation.cc b/webkit/fileapi/file_system_operation.cc
index e636420601454ba2e8449e6a3b034da701974acd..29336a81026613d1403b82817b62515ead54516e 100644
--- a/webkit/fileapi/file_system_operation.cc
+++ b/webkit/fileapi/file_system_operation.cc
@@ -118,14 +118,15 @@ void FileSystemOperation::ReadDirectory(const FilePath& path) {
           &FileSystemOperation::DidReadDirectory));
 }
 
-void FileSystemOperation::Remove(const FilePath& path) {
+void FileSystemOperation::Remove(const FilePath& path, bool recursive) {
 #ifndef NDEBUG
   DCHECK(kOperationNone == pending_operation_);
   pending_operation_ = kOperationRemove;
 #endif
 
-  base::FileUtilProxy::Delete(proxy_, path, callback_factory_.NewCallback(
-      &FileSystemOperation::DidFinishFileOperation));
+  base::FileUtilProxy::Delete(proxy_, path, recursive,
+      callback_factory_.NewCallback(
+          &FileSystemOperation::DidFinishFileOperation));
 }
 
 void FileSystemOperation::Write(