Blob support for IDB [Chromium]

webkit/browser/fileapi/local_file_stream_writer.cc

Index: webkit/browser/fileapi/local_file_stream_writer.cc
diff --git a/webkit/browser/fileapi/local_file_stream_writer.cc b/webkit/browser/fileapi/local_file_stream_writer.cc
index 3f779c969ed0619ffe8c27c2b93789a7d68fe271..743baa630b7c4c2bceadc7cb0bfc5a11acd8fbf9 100644
--- a/webkit/browser/fileapi/local_file_stream_writer.cc
+++ b/webkit/browser/fileapi/local_file_stream_writer.cc
@@ -17,13 +17,18 @@ namespace {
 const int kOpenFlagsForWrite = base::PLATFORM_FILE_OPEN |
                                base::PLATFORM_FILE_WRITE |
                                base::PLATFORM_FILE_ASYNC;
+const int kCreateFlagsForWrite = base::PLATFORM_FILE_CREATE |
+                                 base::PLATFORM_FILE_WRITE |
+                                 base::PLATFORM_FILE_ASYNC;
 
 }  // namespace
 
 LocalFileStreamWriter::LocalFileStreamWriter(base::TaskRunner* task_runner,
                                              const base::FilePath& file_path,
-                                             int64 initial_offset)
+                                             int64 initial_offset,
+                                             bool open_not_create)
     : file_path_(file_path),
+      open_not_create_(open_not_create),
       initial_offset_(initial_offset),
       has_pending_operation_(false),
       weak_factory_(this),
@@ -90,7 +95,8 @@ int LocalFileStreamWriter::InitiateOpen(
   stream_impl_.reset(new net::FileStream(NULL, task_runner_));
 
   return stream_impl_->Open(file_path_,
-                            kOpenFlagsForWrite,
+                            open_not_create_ ? kOpenFlagsForWrite :
+                              kCreateFlagsForWrite,
                             base::Bind(&LocalFileStreamWriter::DidOpen,
                                        weak_factory_.GetWeakPtr(),
                                        error_callback,