Use HitTestAggregator in GpuRootCompositorFrameSink

components/viz/common/switches.h

Index: components/viz/common/switches.h
diff --git a/components/viz/common/switches.h b/components/viz/common/switches.h
new file mode 100644
index 0000000000000000000000000000000000000000..8ae5643914e8333a6c5cc08fca055f884e82ce44
--- /dev/null
+++ b/components/viz/common/switches.h
@@ -0,0 +1,20 @@
+// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Defines all the "viz" command-line switches.
+
+#ifndef COMPONENTS_VIZ_COMMON_SWITCHES_H_
+#define COMPONENTS_VIZ_COMMON_SWITCHES_H_
+
+#include "components/viz/common/common_export.h"
+
+namespace viz {
+namespace switches {
+
+VIZ_COMMON_EXPORT extern const char kUseVizHitTest[];
+
+}  // namespace switches
+}  // namespace viz
+
+#endif  // COMPONENTS_VIZ_COMMON_SWITCHES_H_