IndexedDB: Fixed support for empty blobs.

storage/browser/fileapi/local_file_stream_writer.cc

Index: storage/browser/fileapi/local_file_stream_writer.cc
diff --git a/storage/browser/fileapi/local_file_stream_writer.cc b/storage/browser/fileapi/local_file_stream_writer.cc
index c6a1d5122fcc6445d93a850e24f8ae34e4487e4e..48f24768c0591ab0fcf70fb05905f1a0bc15a47f 100644
--- a/storage/browser/fileapi/local_file_stream_writer.cc
+++ b/storage/browser/fileapi/local_file_stream_writer.cc
@@ -18,19 +18,14 @@ namespace {
 const int kOpenFlagsForWrite = base::File::FLAG_OPEN |
                                base::File::FLAG_WRITE |
                                base::File::FLAG_ASYNC;
-const int kCreateFlagsForWrite = base::File::FLAG_CREATE |
-                                 base::File::FLAG_WRITE |
-                                 base::File::FLAG_ASYNC;
 
 }  // namespace
 
 FileStreamWriter* FileStreamWriter::CreateForLocalFile(
     base::TaskRunner* task_runner,
     const base::FilePath& file_path,
-    int64 initial_offset,
-    OpenOrCreate open_or_create) {
-  return new LocalFileStreamWriter(
-      task_runner, file_path, initial_offset, open_or_create);
+    int64 initial_offset) {
+  return new LocalFileStreamWriter(task_runner, file_path, initial_offset);
 }
 
 LocalFileStreamWriter::~LocalFileStreamWriter() {
@@ -87,14 +82,13 @@ int LocalFileStreamWriter::Flush(const net::CompletionCallback& callback) {
 
 LocalFileStreamWriter::LocalFileStreamWriter(base::TaskRunner* task_runner,
                                              const base::FilePath& file_path,
-                                             int64 initial_offset,
-                                             OpenOrCreate open_or_create)
+                                             int64 initial_offset)
     : file_path_(file_path),
-      open_or_create_(open_or_create),
       initial_offset_(initial_offset),
       task_runner_(task_runner),
       has_pending_operation_(false),
-      weak_factory_(this) {}
+      weak_factory_(this) {
+}
 
 int LocalFileStreamWriter::InitiateOpen(
     const net::CompletionCallback& error_callback,
@@ -104,22 +98,10 @@ int LocalFileStreamWriter::InitiateOpen(
 
   stream_impl_.reset(new net::FileStream(task_runner_));
 
-  int open_flags = 0;
-  switch (open_or_create_) {
-  case OPEN_EXISTING_FILE:
-    open_flags = kOpenFlagsForWrite;
-    break;
-  case CREATE_NEW_FILE:
-    open_flags = kCreateFlagsForWrite;
-    break;
-  }
-
-  return stream_impl_->Open(file_path_,
-                            open_flags,
-                            base::Bind(&LocalFileStreamWriter::DidOpen,
-                                       weak_factory_.GetWeakPtr(),
-                                       error_callback,
-                                       main_operation));
+  return stream_impl_->Open(
+      file_path_, kOpenFlagsForWrite,
+      base::Bind(&LocalFileStreamWriter::DidOpen, weak_factory_.GetWeakPtr(),
+                 error_callback, main_operation));
 }
 
 void LocalFileStreamWriter::DidOpen(