Replace "nested message loop" with "nested run loop" in comments.

ui/views/widget/desktop_aura/desktop_drag_drop_client_aurax11.h

 // 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.
 
 #ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_AURAX11_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_AURAX11_H_
 
 #include <X11/Xlib.h>
 
 #include <memory>
@@ skipping 183 matching lines @@
                         unsigned long event_time);
   void SendXdndDrop(::Window dest_window);
 
   // Creates a widget for the user to drag around.
   void CreateDragWidget(const gfx::ImageSkia& image);
 
   // Returns true if |image| has any visible regions (defined as having a pixel
   // with alpha > 32).
   bool IsValidDragImage(const gfx::ImageSkia& image);
 
-  // A nested message loop that notifies this object of events through the
+  // A nested run loop that notifies this object of events through the
   // X11MoveLoopDelegate interface.
   std::unique_ptr<X11MoveLoop> move_loop_;
 
   aura::Window* root_window_;
 
   DesktopNativeCursorManager* cursor_manager_;
 
   Display* xdisplay_;
   ::Window xwindow_;
 
@@ skipping 71 matching lines @@
   gfx::Vector2d drag_widget_offset_;
 
   base::WeakPtrFactory<DesktopDragDropClientAuraX11> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopDragDropClientAuraX11);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_DRAG_DROP_CLIENT_AURAX11_H_