[ios clean] Moves animator and presenters under transitions

ios/clean/chrome/browser/ui/root/root_container_view_controller_unittest.mm

 // Copyright 2017 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.
 
 #import "ios/clean/chrome/browser/ui/root/root_container_view_controller.h"
 
 #include "base/macros.h"
-#import "ios/clean/chrome/browser/ui/animators/zoom_transition_delegate.h"
+#import "ios/clean/chrome/browser/ui/transitions/animators/zoom_transition_delegate.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 
@@ skipping 60 matching lines @@
   rootViewController_.contentViewController = contentViewController_;
   [rootViewController_ loadViewIfNeeded];
   UIViewController* differentViewController = [[UIViewController alloc] init];
   rootViewController_.contentViewController = differentViewController;
   EXPECT_EQ(1u, rootViewController_.childViewControllers.count);
   EXPECT_EQ([rootViewController_.childViewControllers lastObject],
             differentViewController);
 }
 
 }  // namespace