Added UMA counters for Android tool-types.

ui/events/gesture_detection/motion_event.h

 // Copyright 2014 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 UI_EVENTS_GESTURE_DETECTION_MOTION_EVENT_H_
 #define UI_EVENTS_GESTURE_DETECTION_MOTION_EVENT_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 13 matching lines @@
     ACTION_DOWN,
     ACTION_UP,
     ACTION_MOVE,
     ACTION_CANCEL,
     ACTION_POINTER_DOWN,
     ACTION_POINTER_UP,
     ACTION_HOVER_ENTER,
     ACTION_HOVER_EXIT,
     ACTION_HOVER_MOVE,
     ACTION_BUTTON_PRESS,
-    ACTION_BUTTON_RELEASE
+    ACTION_BUTTON_RELEASE,
+    ACTION_LAST = ACTION_BUTTON_RELEASE
   };
 
   enum ToolType {
     TOOL_TYPE_UNKNOWN,
     TOOL_TYPE_FINGER,
     TOOL_TYPE_STYLUS,
     TOOL_TYPE_MOUSE,
-    TOOL_TYPE_ERASER
+    TOOL_TYPE_ERASER,
+    TOOL_TYPE_LAST = TOOL_TYPE_ERASER
   };
 
   enum ButtonType {
     BUTTON_PRIMARY = 1 << 0,
     BUTTON_SECONDARY = 1 << 1,
     BUTTON_TERTIARY = 1 << 2,
     BUTTON_BACK = 1 << 3,
     BUTTON_FORWARD = 1 << 4,
     BUTTON_STYLUS_PRIMARY = 1 << 5,
-    BUTTON_STYLUS_SECONDARY = 1 << 6,
+    BUTTON_STYLUS_SECONDARY = 1 << 6
   };
 
   // The implementer promises that |GetPointerId()| will never exceed
   // MAX_POINTER_ID.
   enum { MAX_POINTER_ID = 31, MAX_TOUCH_POINT_COUNT = 16 };
 
   virtual ~MotionEvent() {}
 
   // An unique identifier this motion event.
   virtual uint32_t GetUniqueEventId() const = 0;
@@ skipping 60 matching lines @@
   // They guarantee only that the returned type will reflect the same
   // data exposed by the MotionEvent interface; no guarantees are made that the
   // underlying implementation is identical to the source implementation.
   std::unique_ptr<MotionEvent> Clone() const;
   std::unique_ptr<MotionEvent> Cancel() const;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_GESTURE_DETECTION_MOTION_EVENT_H_