diff -r 000000000000 -r 6474c204b198 gfx/2d/DrawEventRecorder.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/2d/DrawEventRecorder.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,54 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "DrawEventRecorder.h"
+#include "PathRecording.h"
+
+namespace mozilla {
+namespace gfx {
+
+using namespace std;
+
+const uint32_t kMagicInt = 0xc001feed;
+
+DrawEventRecorderPrivate::DrawEventRecorderPrivate(std::ostream *aStream)
+  : mOutputStream(aStream)
+{
+}
+
+void
+DrawEventRecorderPrivate::RecordEvent(const RecordedEvent &aEvent)
+{
+  WriteElement(*mOutputStream, aEvent.mType);
+
+  aEvent.RecordToStream(*mOutputStream);
+
+  Flush();
+}
+
+DrawEventRecorderFile::DrawEventRecorderFile(const char *aFilename)
+  : DrawEventRecorderPrivate(nullptr) 
+  , mOutputFile(aFilename, ofstream::binary)
+{
+  mOutputStream = &mOutputFile;
+
+  WriteElement(*mOutputStream, kMagicInt);
+  WriteElement(*mOutputStream, kMajorRevision);
+  WriteElement(*mOutputStream, kMinorRevision);
+}
+
+DrawEventRecorderFile::~DrawEventRecorderFile()
+{
+  mOutputFile.close();
+}
+
+void
+DrawEventRecorderFile::Flush()
+{
+  mOutputFile.flush();
+}
+
+}
+}