Clean up GestureEventDetails constructors

ui/events/gesture_detection/gesture_provider.cc

Index: ui/events/gesture_detection/gesture_provider.cc
diff --git a/ui/events/gesture_detection/gesture_provider.cc b/ui/events/gesture_detection/gesture_provider.cc
index 5cbe56fac43f21dc8c6ac9b3131ebe668447d874..4d1ed088815de057e9877b542fd3ebe2df9e5186 100644
--- a/ui/events/gesture_detection/gesture_provider.cc
+++ b/ui/events/gesture_detection/gesture_provider.cc
@@ -245,7 +245,8 @@ class GestureProvider::GestureListenerImpl
                                  : 1.0f - kDoubleTapDragZoomSpeed,
                        std::abs(dy));
     }
-    GestureEventDetails pinch_details(ET_GESTURE_PINCH_UPDATE, scale, 0);
+    GestureEventDetails pinch_details(ET_GESTURE_PINCH_UPDATE);
+    pinch_details.set_scale(scale);
     Send(CreateGesture(pinch_details,
                        e.GetId(),
                        e.GetToolType(),
@@ -261,7 +262,7 @@ class GestureProvider::GestureListenerImpl
 
   // GestureDetector::GestureListener implementation.
   virtual bool OnDown(const MotionEvent& e) OVERRIDE {
-    GestureEventDetails tap_details(ET_GESTURE_TAP_DOWN, 0, 0);
+    GestureEventDetails tap_details(ET_GESTURE_TAP_DOWN);
     Send(CreateGesture(tap_details, e));
 
     // Return true to indicate that we want to handle touch.
@@ -398,7 +399,7 @@ class GestureProvider::GestureListenerImpl
   }
 
   virtual void OnShowPress(const MotionEvent& e) OVERRIDE {
-    GestureEventDetails show_press_details(ET_GESTURE_SHOW_PRESS, 0, 0);
+    GestureEventDetails show_press_details(ET_GESTURE_SHOW_PRESS);
     show_press_event_sent_ = true;
     Send(CreateGesture(show_press_details, e));
   }
@@ -428,7 +429,7 @@ class GestureProvider::GestureListenerImpl
     if (e.GetAction() == MotionEvent::ACTION_UP &&
         !current_longpress_time_.is_null() &&
         !IsScaleGestureDetectionInProgress()) {
-      GestureEventDetails long_tap_details(ET_GESTURE_LONG_TAP, 0, 0);
+      GestureEventDetails long_tap_details(ET_GESTURE_LONG_TAP);
       Send(CreateGesture(long_tap_details, e));
       return true;
     }
@@ -477,7 +478,7 @@ class GestureProvider::GestureListenerImpl
   virtual void OnLongPress(const MotionEvent& e) OVERRIDE {
     DCHECK(!IsDoubleTapInProgress());
     SetIgnoreSingleTap(true);
-    GestureEventDetails long_press_details(ET_GESTURE_LONG_PRESS, 0, 0);
+    GestureEventDetails long_press_details(ET_GESTURE_LONG_PRESS);
     Send(CreateGesture(long_press_details, e));
   }
 
@@ -513,7 +514,7 @@ class GestureProvider::GestureListenerImpl
                                  float raw_y,
                                  size_t touch_point_count,
                                  const gfx::RectF& bounding_box) {
-    return GestureEventData(GestureEventDetails(type, 0, 0),
+    return GestureEventData(GestureEventDetails(type),
                             motion_event_id,
                             primary_tool_type,
                             time,
@@ -540,14 +541,16 @@ class GestureProvider::GestureListenerImpl
   }
 
   GestureEventData CreateGesture(EventType type, const MotionEvent& event) {
-    return CreateGesture(GestureEventDetails(type, 0, 0), event);
+    return CreateGesture(GestureEventDetails(type), event);
   }
 
   GestureEventData CreateTapGesture(EventType type, const MotionEvent& event) {
     // Set the tap count to 1 even for ET_GESTURE_DOUBLE_TAP, in order to be
     // consistent with double tap behavior on a mobile viewport. See
     // crbug.com/234986 for context.
-    return CreateGesture(GestureEventDetails(type, 1, 0), event);
+    GestureEventDetails details(type);
+    details.set_tap_count(1);
+    return CreateGesture(details, event);
   }
 
   gfx::RectF GetBoundingBox(const MotionEvent& event, EventType type) {