Update callers of CreateFileSystemOperation so more detailed error codes can be returned. Where app…

webkit/fileapi/sandbox_file_stream_writer.cc

Index: webkit/fileapi/sandbox_file_stream_writer.cc
diff --git a/webkit/fileapi/sandbox_file_stream_writer.cc b/webkit/fileapi/sandbox_file_stream_writer.cc
index 2dafb589f2841271341cf92cd0db6485d3286812..a12e00e743293460cc9269fe76503569fd511e7f 100644
--- a/webkit/fileapi/sandbox_file_stream_writer.cc
+++ b/webkit/fileapi/sandbox_file_stream_writer.cc
@@ -66,8 +66,12 @@ int SandboxFileStreamWriter::Write(
   if (local_file_writer_.get())
     return WriteInternal(buf, buf_len, callback);
 
+  base::PlatformFileError error_code;
   FileSystemOperation* operation =
-      file_system_context_->CreateFileSystemOperation(url_);
+      file_system_context_->CreateFileSystemOperation(url_, &error_code);
+  if (error_code != base::PLATFORM_FILE_OK)
+    return net::PlatformFileErrorToNetError(error_code);
+
   DCHECK(operation);
   net::CompletionCallback write_task =
       base::Bind(&SandboxFileStreamWriter::DidInitializeForWrite,