Add UMA metrics to measure the effectiveness of views fuzzing

ash/wm/workspace/frame_maximize_button.cc

 // Copyright (c) 2012 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.
 
 #include "ash/wm/workspace/frame_maximize_button.h"
 
 #include "ash/launcher/launcher.h"
 #include "ash/screen_ash.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
+#include "ash/touch/touch_uma.h"
 #include "ash/wm/maximize_bubble_controller.h"
 #include "ash/wm/property_util.h"
 #include "ash/wm/window_properties.h"
 #include "ash/wm/window_util.h"
 #include "ash/wm/workspace/phantom_window_controller.h"
 #include "ash/wm/workspace/snap_sizer.h"
 #include "grit/ash_strings.h"
 #include "ui/aura/window.h"
 #include "ui/base/events/event.h"
 #include "ui/base/events/event_handler.h"
@@ skipping 250 matching lines @@
     return;
   }
 
   if (event->type() == ui::ET_GESTURE_TAP ||
       (event->type() == ui::ET_GESTURE_SCROLL_END && is_snap_enabled_) ||
       event->type() == ui::ET_SCROLL_FLING_START) {
     // The position of the event may have changed from the previous event (both
     // for TAP and SCROLL_END). So it is necessary to update the snap-state for
     // the current event.
     ProcessUpdateEvent(*event);
-    if (event->type() == ui::ET_GESTURE_TAP)
+    if (event->type() == ui::ET_GESTURE_TAP) {
       snap_type_ = SnapTypeForLocation(event->location());
+      TouchUMA::GetInstance()->RecordGestureAction(
+          TouchUMA::GESTURE_FRAMEMAXIMIZE_TAP);
+    }
     ProcessEndEvent(*event);
     event->SetHandled();
     return;
   }
 
   if (is_snap_enabled_) {
     if (event->type() == ui::ET_GESTURE_END &&
         event->details().touch_points() == 1) {
       // The position of the event may have changed from the previous event. So
       // it is necessary to update the snap-state for the current event.
@@ skipping 317 matching lines @@
     return FRAME_STATE_SNAP_LEFT;
   if (bounds.right() == screen.right())
     return FRAME_STATE_SNAP_RIGHT;
   // If we come here, it is likely caused by the fact that the
   // "VerticalResizeDoubleClick" stored a restore rectangle. In that case
   // we allow all maximize operations (and keep the restore rectangle).
   return FRAME_STATE_NONE;
 }
 
 }  // namespace ash