Wires up drags to pointer watcher adapter.

ui/views/pointer_watcher.h

Index: ui/views/pointer_watcher.h
diff --git a/ui/views/pointer_watcher.h b/ui/views/pointer_watcher.h
index 8270683214e99f946e0629d433a31662fb71d3a0..ff80d9d016149243f335edf8f985dbd6c493cb31 100644
--- a/ui/views/pointer_watcher.h
+++ b/ui/views/pointer_watcher.h
@@ -19,6 +19,16 @@ class PointerEvent;
 namespace views {
 class Widget;
 
+// When pointer watchers are added they need to specify which events they want
+// to receive. BASIC means they receive only presses and releases, MOVES means

[sky, 2016/08/26 15:36:55]

BASIC also means you get capture events and wheel events.

[sammiequon, 2016/08/26 18:34:20]

Done.

+// they recieve move events as well and DRAGS means they receive drag events as
+// well.
+enum class RequestedEvents {

[sky, 2016/08/26 15:36:55]

This name is too generic outside of a class, how about PointerWatcherEventTypes.

[sammiequon, 2016/08/26 18:34:20]

Done.

+  BASIC = 0x01,
+  MOVES = 0x02,
+  DRAGS = 0x04
+};
+
 // An interface for read-only observation of pointer events (in particular, the
 // events cannot be marked as handled). Only certain event types are supported.
 // The |target| is the top-level widget that will receive the event, if any.