Revert of Move DefaultActivationClient to wm/core

chrome/browser/ui/views/accessibility/accessibility_event_router_views_unittest.cc

Index: chrome/browser/ui/views/accessibility/accessibility_event_router_views_unittest.cc
diff --git a/chrome/browser/ui/views/accessibility/accessibility_event_router_views_unittest.cc b/chrome/browser/ui/views/accessibility/accessibility_event_router_views_unittest.cc
index 49328c7660394396b2f5a6058604d344e096ee64..3c4ffbf1605a2cafb792155559f69fd3342f02c4 100644
--- a/chrome/browser/ui/views/accessibility/accessibility_event_router_views_unittest.cc
+++ b/chrome/browser/ui/views/accessibility/accessibility_event_router_views_unittest.cc
@@ -35,7 +35,6 @@
 #include "ui/aura/test/aura_test_helper.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/compositor/test/context_factories_for_test.h"
-#include "ui/wm/core/default_activation_client.h"
 #endif
 
 using base::ASCIIToUTF16;
@@ -114,7 +113,6 @@
 
     aura_test_helper_.reset(new aura::test::AuraTestHelper(&message_loop_));
     aura_test_helper_->SetUp();
-    new wm::DefaultActivationClient(aura_test_helper_->root_window());
 #endif  // USE_AURA
     EnableAccessibilityAndListenToFocusNotifications();
   }