1 files changed, 37 insertions, 0 deletions
diff --git a/gfx/layers/apz/public/MetricsSharingController.h b/gfx/layers/apz/public/MetricsSharingController.h
new file mode 100644
index 0000000000..869f2e2346
--- /dev/null
+++ b/gfx/layers/apz/public/MetricsSharingController.h
@@ -0,0 +1,37 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 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 "nsISupportsImpl.h"  // for NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING
+
+namespace mozilla {
+namespace layers {
+
+class MetricsSharingController {
+ public:
+  NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING
+
+  virtual base::ProcessId RemotePid() = 0;
+  virtual bool StartSharingMetrics(
+      mozilla::ipc::SharedMemoryBasic::Handle aHandle,
+      CrossProcessMutexHandle aMutexHandle, LayersId aLayersId,
+      uint32_t aApzcId) = 0;
+  virtual bool StopSharingMetrics(ScrollableLayerGuid::ViewID aScrollId,
+                                  uint32_t aApzcId) = 0;
+
+ protected:
+  virtual ~MetricsSharingController() = default;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif  // mozilla_layers_MetricsSharingController_h