Wires up drags to pointer watcher adapter.

ash/mus/bridge/wm_shell_mus.cc

 // Copyright 2016 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/mus/bridge/wm_shell_mus.h"
 
 #include <utility>
 
 #include "ash/common/accelerators/accelerator_controller.h"
 #include "ash/common/display/display_info.h"
@@ skipping 356 matching lines @@
 
 void WmShellMus::AddDisplayObserver(WmDisplayObserver* observer) {
   NOTIMPLEMENTED();
 }
 
 void WmShellMus::RemoveDisplayObserver(WmDisplayObserver* observer) {
   NOTIMPLEMENTED();
 }
 
 void WmShellMus::AddPointerWatcher(views::PointerWatcher* watcher,
-                                   bool wants_moves) {
+                                   bool wants_moves,
+                                   bool wants_drags) {
   pointer_watcher_event_router_->AddPointerWatcher(watcher, wants_moves);

[sky, 2016/08/24 23:33:01]

Add a NOTIMPLEMENTED in file a bug here for the mus side.

[sammiequon, 2016/08/25 23:11:18]

Done.

 }
 
 void WmShellMus::RemovePointerWatcher(views::PointerWatcher* watcher) {
   pointer_watcher_event_router_->RemovePointerWatcher(watcher);
 }
 
 bool WmShellMus::IsTouchDown() {
   // TODO: implement me, http://crbug.com/634967.
   // NOTIMPLEMENTED is too spammy here.
   return false;
@@ skipping 30 matching lines @@
                     OnWindowActivated(gained_active, lost_active));
 }
 
 void WmShellMus::OnDidDestroyClient(ui::WindowTreeClient* client) {
   DCHECK_EQ(window_tree_client(), client);
   client->RemoveObserver(this);
 }
 
 }  // namespace mus
 }  // namespace ash