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

ui/events/test/event_generator.h

 // Copyright 2014 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_EVENTS_TEST_EVENT_GENERATOR_H_
 #define UI_EVENTS_TEST_EVENT_GENERATOR_H_
 
 #include <list>
 #include <memory>
 #include <vector>
@@ skipping 72 matching lines @@
 
 // ui::test::EventGenerator is a tool that generates and dispatches events.
 // Unlike |ui_controls| package in ui/base/test, this does not use platform
 // native message loops. Instead, it sends events to the event dispatcher
 // synchronously.
 //
 // This class is not suited for the following cases:
 //
 // 1) If your test depends on native events (ui::Event::native_event()).
 //   This return is empty/NULL event with EventGenerator.
-// 2) If your test involves nested message loop, such as
+// 2) If your test involves nested run loop, such as
 //    menu or drag & drop. Because this class directly
 //    post an event to WindowEventDispatcher, this event will not be
-//    handled in the nested message loop.
+//    handled in the nested run loop.
 // 3) Similarly, |base::MessagePumpObserver| will not be invoked.
 // 4) Any other code that requires native message loops, such as
 //    tests for WindowTreeHostWin/WindowTreeHostX11.
 //
 // If one of these applies to your test, please use |ui_controls|
 // package instead.
 //
 // Note: The coordinates of the points in API is determined by the
 // EventGeneratorDelegate.
 class EventGenerator {
@@ skipping 372 matching lines @@
 
   std::unique_ptr<base::TickClock> tick_clock_;
 
   DISALLOW_COPY_AND_ASSIGN(EventGenerator);
 };
 
 }  // namespace test
 }  // namespace ui
 
 #endif  // UI_EVENTS_TEST_EVENT_GENERATOR_H_