Add UMA metrics to measure the effectiveness of views fuzzing

chrome/browser/ui/views/tabs/tab_strip.cc

Index: chrome/browser/ui/views/tabs/tab_strip.cc
diff --git a/chrome/browser/ui/views/tabs/tab_strip.cc b/chrome/browser/ui/views/tabs/tab_strip.cc
index 68fede90480e98b164fbbd69695457df5428ed2a..b3f5427ed434fdf7560406e74586bb1aff3c145f 100644
--- a/chrome/browser/ui/views/tabs/tab_strip.cc
+++ b/chrome/browser/ui/views/tabs/tab_strip.cc
@@ -56,6 +56,12 @@
 #include "win8/util/win8_util.h"
 #endif
 
+#if defined(USE_ASH)
+#include "ash/touch/touch_uma.h"
+
+using ash::internal::TouchUMA;
+#endif
+
 using content::UserMetricsAction;
 using ui::DropTargetEvent;
 
@@ -1495,6 +1501,11 @@ void TabStrip::ButtonPressed(views::Button* sender, const ui::Event& event) {
     UMA_HISTOGRAM_ENUMERATION("Tab.NewTab", TabStripModel::NEW_TAB_BUTTON,
                               TabStripModel::NEW_TAB_ENUM_COUNT);
     controller()->CreateNewTab();
+#if defined(USE_ASH)
+    if (event.type() == ui::ET_GESTURE_TAP)
+      TouchUMA::GetInstance()->RecordGestureAction(
+          TouchUMA::GESTURE_NEWTAB_TAP);
+#endif
   }
 }
 
@@ -1583,6 +1594,19 @@ void TabStrip::OnGestureEvent(ui::GestureEvent* event) {
       EndDrag(END_DRAG_CANCEL);
       break;
 
+#if defined(USE_ASH)
+    case ui::ET_GESTURE_TAP: {
+      const int active_index = controller_->GetActiveIndex();
+      DCHECK_NE(-1, active_index);
+      Tab* active_tab = tab_at(active_index);
+      TouchUMA::GestureActionType action = TouchUMA::GESTURE_TABNOSWITCH_TAP;
+      if (active_tab->tab_activated_with_last_gesture_begin())
+        action = TouchUMA::GESTURE_TABSWITCH_TAP;
+      TouchUMA::GetInstance()->RecordGestureAction(action);
+      break;
+    }
+#endif
+
     default:
       break;
   }