Replace MessageLoop::current()->task_runner() with ThreadTaskRunnerHandle::Get().

ui/views/widget/desktop_aura/x11_whole_screen_move_loop.cc

 // Copyright (c) 2012 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 "ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h"
 
 #include <stddef.h>
 #include <X11/keysym.h>
 #include <X11/Xlib.h>
 #include <utility>
 
 #include "base/bind.h"
+#include "base/logging.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/base/x/x11_window_event_manager.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/keycodes/keyboard_code_conversion_x.h"
@@ skipping 39 matching lines @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopWindowTreeHostLinux, ui::PlatformEventDispatcher implementation:
 
 bool X11WholeScreenMoveLoop::CanDispatchEvent(const ui::PlatformEvent& event) {
   return in_move_loop_;
 }
 
 uint32_t X11WholeScreenMoveLoop::DispatchEvent(const ui::PlatformEvent& event) {
+  DCHECK(base::MessageLoopForUI::IsCurrent());
+
   // This method processes all events while the move loop is active.
   if (!in_move_loop_)
     return ui::POST_DISPATCH_PERFORM_DEFAULT;
 
   XEvent* xev = event;
   ui::EventType type = ui::EventTypeFromNative(xev);
   switch (type) {
     case ui::ET_MOUSE_MOVED:
     case ui::ET_MOUSE_DRAGGED: {
       bool dispatch_mouse_event = !last_motion_in_screen_.get();
       last_motion_in_screen_.reset(
           ui::EventFromNative(xev).release()->AsMouseEvent());
       last_motion_in_screen_->set_location(
           ui::EventSystemLocationFromNative(xev));
       if (dispatch_mouse_event) {
         // Post a task to dispatch mouse movement event when control returns to
         // the message loop. This allows smoother dragging since the events are
         // dispatched without waiting for the drag widget updates.
-        base::MessageLoopForUI::current()->task_runner()->PostTask(
+        base::ThreadTaskRunnerHandle::Get()->PostTask(
             FROM_HERE,
             base::Bind(&X11WholeScreenMoveLoop::DispatchMouseMovement,
                        weak_factory_.GetWeakPtr()));
       }
       return ui::POST_DISPATCH_NONE;
     }
     case ui::ET_MOUSE_RELEASED: {
       int button = (xev->type == ButtonRelease)
           ? xev->xbutton.button
           : ui::EventButtonFromNative(xev);
@@ skipping 167 matching lines @@
                         PointerMotionMask | KeyPressMask | KeyReleaseMask |
                         StructureNotifyMask;
   grab_input_window_events_.reset(
       new ui::XScopedEventSelector(grab_input_window_, event_mask));
 
   XMapRaised(display, grab_input_window_);
   ui::X11EventSource::GetInstance()->BlockUntilWindowMapped(grab_input_window_);
 }
 
 }  // namespace views