diff -r 000000000000 -r 6474c204b198 gfx/2d/DrawEventRecorder.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/2d/DrawEventRecorder.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,81 @@
+/* -*- 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/. */
+
+#ifndef MOZILLA_GFX_DRAWEVENTRECORDER_H_
+#define MOZILLA_GFX_DRAWEVENTRECORDER_H_
+
+#include "2D.h"
+#include "RecordedEvent.h"
+#include <ostream>
+#include <fstream>
+
+#if defined(_MSC_VER)
+#include <hash_set>
+#else
+#include <set>
+#endif
+
+namespace mozilla {
+namespace gfx {
+
+class PathRecording;
+
+class DrawEventRecorderPrivate : public DrawEventRecorder
+{
+public:
+  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawEventRecorderPrivate)
+  DrawEventRecorderPrivate(std::ostream *aStream);
+  virtual ~DrawEventRecorderPrivate() { }
+
+  void RecordEvent(const RecordedEvent &aEvent);
+  void WritePath(const PathRecording *aPath);
+
+  void AddStoredPath(const ReferencePtr aPath) {
+    mStoredPaths.insert(aPath);
+  }
+
+  void RemoveStoredPath(const ReferencePtr aPath) {
+    mStoredPaths.erase(aPath);
+  }
+
+  bool HasStoredPath(const ReferencePtr aPath) {
+    if (mStoredPaths.find(aPath) != mStoredPaths.end()) {
+      return true;
+    }
+    return false;
+  }
+
+protected:
+  std::ostream *mOutputStream;
+
+  virtual void Flush() = 0;
+
+#if defined(_MSC_VER)
+  typedef stdext::hash_set<const void*> ObjectSet;
+#else
+  typedef std::set<const void*> ObjectSet;
+#endif
+
+  ObjectSet mStoredPaths;
+  ObjectSet mStoredScaledFonts;
+};
+
+class DrawEventRecorderFile : public DrawEventRecorderPrivate
+{
+public:
+  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawEventRecorderFile)
+  DrawEventRecorderFile(const char *aFilename);
+  ~DrawEventRecorderFile();
+
+private:
+  virtual void Flush();
+
+  std::ofstream mOutputFile;
+};
+
+}
+}
+
+#endif /* MOZILLA_GFX_DRAWEVENTRECORDER_H_ */