Refactor TouchSelectionDraggableClient APIs

ui/touch_selection/longpress_drag_selector.cc

Index: ui/touch_selection/longpress_drag_selector.cc
diff --git a/ui/touch_selection/longpress_drag_selector.cc b/ui/touch_selection/longpress_drag_selector.cc
index b84c90da9e137cc9f5c068ae75941aa8aaededa6..9bf9fbb144afe638309ed63ccaf8364574c91093 100644
--- a/ui/touch_selection/longpress_drag_selector.cc
+++ b/ui/touch_selection/longpress_drag_selector.cc
@@ -53,7 +53,7 @@ bool LongPressDragSelector::WillHandleTouchEvent(const MotionEvent& event) {
   gfx::PointF position(event.GetX(), event.GetY());
   if (state_ == DRAGGING) {
     gfx::PointF drag_position = position + longpress_drag_selection_offset_;
-    client_->OnDragUpdate(*this, drag_position);
+    client_->OnDragEvent(HANDLE_DRAG_UPDATE, *this, drag_position);
     return true;
   }
 
@@ -102,7 +102,7 @@ bool LongPressDragSelector::WillHandleTouchEvent(const MotionEvent& event) {
 
   gfx::PointF extent = extend_selection_start ? selection_start : selection_end;
   longpress_drag_selection_offset_ = extent - position;
-  client_->OnDragBegin(*this, extent);
+  client_->OnDragEvent(HANDLE_DRAG_BEGIN, *this, extent);
   SetState(DRAGGING);
   return true;
 }
@@ -145,7 +145,7 @@ void LongPressDragSelector::SetState(SelectionState state) {
 
   // TODO(jdduke): Add UMA for tracking relative longpress drag frequency.
   if (was_dragging)
-    client_->OnDragEnd(*this);
+    client_->OnDragEvent(HANDLE_DRAG_END, *this, gfx::PointF());
 
   if (was_active != IsActive())
     client_->OnLongPressDragActiveStateChanged();