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

ui/views/widget/widget.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_WIDGET_H_
 #define UI_VIEWS_WIDGET_WIDGET_H_
 
 #include <map>
 #include <memory>
 #include <set>
@@ skipping 447 matching lines @@
   // Default is true.
   void SetVisibilityChangedAnimationsEnabled(bool value);
 
   // Sets the duration of visibility change animations.
   void SetVisibilityAnimationDuration(const base::TimeDelta& duration);
 
   // Sets the visibility transitions that should animate.
   // Default behavior is to animate both show and hide.
   void SetVisibilityAnimationTransition(VisibilityTransition transition);
 
-  // Starts a nested message loop that moves the window. This can be used to
+  // Starts a nested run loop that moves the window. This can be used to
   // start a window move operation from a mouse or touch event. This returns
   // when the move completes. |drag_offset| is the offset from the top left
   // corner of the window to the point where the cursor is dragging, and is used
   // to offset the bounds of the window from the cursor.
   MoveLoopResult RunMoveLoop(const gfx::Vector2d& drag_offset,
                              MoveLoopSource source,
                              MoveLoopEscapeBehavior escape_behavior);
 
   // Stops a previously started move loop. This is not immediate.
   void EndMoveLoop();
@@ skipping 509 matching lines @@
   bool movement_disabled_;
 
   ScopedObserver<ui::NativeTheme, ui::NativeThemeObserver> observer_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_WIDGET_H_