Adds WmShell::RecordGestureAction()

ash/common/metrics/gesture_action_type.h

Index: ash/common/metrics/gesture_action_type.h
diff --git a/ash/common/metrics/gesture_action_type.h b/ash/common/metrics/gesture_action_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..feee85a84ce64ef780270968cd03625ada8f9833
--- /dev/null
+++ b/ash/common/metrics/gesture_action_type.h
@@ -0,0 +1,40 @@
+// Copyright 2016 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.
+
+#ifndef ASH_COMMON_METRICS_GESTURE_ACTION_TYPE_H_
+#define ASH_COMMON_METRICS_GESTURE_ACTION_TYPE_H_
+
+namespace ash {
+
+enum GestureActionType {
+  GESTURE_UNKNOWN,
+  GESTURE_OMNIBOX_PINCH,
+  GESTURE_OMNIBOX_SCROLL,
+  GESTURE_TABSTRIP_PINCH,
+  GESTURE_TABSTRIP_SCROLL,
+  GESTURE_BEZEL_SCROLL,
+  GESTURE_DESKTOP_SCROLL,
+  GESTURE_DESKTOP_PINCH,
+  GESTURE_WEBPAGE_PINCH,
+  GESTURE_WEBPAGE_SCROLL,
+  GESTURE_WEBPAGE_TAP,
+  GESTURE_TABSTRIP_TAP,
+  GESTURE_BEZEL_DOWN,
+  GESTURE_TABSWITCH_TAP,
+  GESTURE_TABNOSWITCH_TAP,
+  GESTURE_TABCLOSE_TAP,
+  GESTURE_NEWTAB_TAP,
+  GESTURE_ROOTVIEWTOP_TAP,
+  GESTURE_FRAMEMAXIMIZE_TAP,
+  GESTURE_FRAMEVIEW_TAP,
+  GESTURE_MAXIMIZE_DOUBLETAP,
+  // NOTE: Add new action types only immediately above this line. Also,
+  // make sure the enum list in tools/histogram/histograms.xml is
+  // updated with any change in here.
+  GESTURE_ACTION_COUNT
+};
+
+}  // namespace ash
+
+#endif  // ASH_COMMON_METRICS_GESTURE_ACTION_TYPE_H_