1 files changed, 40 insertions, 0 deletions
diff --git a/gfx/layers/apz/public/MetricsSharingController.h b/gfx/layers/apz/public/MetricsSharingController.h
new file mode 100644
index 000000000..090878573
--- /dev/null
+++ b/gfx/layers/apz/public/MetricsSharingController.h
@@ -0,0 +1,40 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=4 ts=8 et tw=80 : */
+/* 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_layers_MetricsSharingController_h
+#define mozilla_layers_MetricsSharingController_h
+
+#include "FrameMetrics.h" // for FrameMetrics
+#include "mozilla/ipc/CrossProcessMutex.h" // for CrossProcessMutexHandle
+#include "mozilla/ipc/SharedMemoryBasic.h" // for SharedMemoryBasic
+#include "mozilla/RefCountType.h" // for MozExternalRefCountType
+#include "nscore.h" // for NS_IMETHOD_
+
+namespace mozilla {
+namespace layers {
+
+class MetricsSharingController
+{
+public:
+  NS_IMETHOD_(MozExternalRefCountType) AddRef() = 0;
+  NS_IMETHOD_(MozExternalRefCountType) Release() = 0;
+
+  virtual base::ProcessId RemotePid() = 0;
+  virtual bool StartSharingMetrics(mozilla::ipc::SharedMemoryBasic::Handle aHandle,
+                                   CrossProcessMutexHandle aMutexHandle,
+                                   uint64_t aLayersId,
+                                   uint32_t aApzcId) = 0;
+  virtual bool StopSharingMetrics(FrameMetrics::ViewID aScrollId,
+                                  uint32_t aApzcId) = 0;
+
+protected:
+  virtual ~MetricsSharingController() {}
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif // mozilla_layers_MetricsSharingController_h