Remove unnecessary uses of aura::Env::GetDispatcher

ui/aura/root_window_unittest.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/aura/root_window.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/run_loop.h"
@@ skipping 425 matching lines @@
   }
 
   const Events& events() const { return events_; }
 
   const EventLocations& mouse_locations() const { return mouse_locations_; }
   gfx::Point mouse_location(int i) const { return mouse_locations_[i]; }
   const EventLocations& touch_locations() const { return touch_locations_; }
 
   void WaitUntilReceivedEvent(ui::EventType type) {
     wait_until_event_ = type;
-    run_loop_.reset(new base::RunLoop(
-        Env::GetInstance()->GetDispatcher()));
+    run_loop_.reset(new base::RunLoop());
     run_loop_->Run();
   }
 
   Events GetAndResetEvents() {
     Events events = events_;
     Reset();
     return events;
   }
 
   void Reset() {
@@ skipping 1214 matching lines @@
   EXPECT_EQ("TOUCH_MOVED TOUCH_RELEASED GESTURE_SCROLL_END GESTURE_END",
             EventTypesToString(events));
   ASSERT_EQ(2u, filter->touch_locations().size());
   EXPECT_EQ(gfx::Point(-40, 10).ToString(),
             filter->touch_locations()[0].ToString());
   EXPECT_EQ(gfx::Point(-40, 10).ToString(),
             filter->touch_locations()[1].ToString());
 }
 
 }  // namespace aura