Revert of Move DefaultActivationClient to wm/core

ui/keyboard/keyboard_controller_unittest.cc

Index: ui/keyboard/keyboard_controller_unittest.cc
diff --git a/ui/keyboard/keyboard_controller_unittest.cc b/ui/keyboard/keyboard_controller_unittest.cc
index 62b0d73ec7dc0e6aca8e0b03c6fd7ad276bb01e7..4333c84a17e6021a3b2c06523df26e86e7b2b2a0 100644
--- a/ui/keyboard/keyboard_controller_unittest.cc
+++ b/ui/keyboard/keyboard_controller_unittest.cc
@@ -28,7 +28,6 @@
 #include "ui/keyboard/keyboard_controller_proxy.h"
 #include "ui/keyboard/keyboard_switches.h"
 #include "ui/keyboard/keyboard_util.h"
-#include "ui/wm/core/default_activation_client.h"
 
 namespace keyboard {
 namespace {
@@ -169,7 +168,6 @@
 
     aura_test_helper_.reset(new aura::test::AuraTestHelper(&message_loop_));
     aura_test_helper_->SetUp();
-    new wm::DefaultActivationClient(aura_test_helper_->root_window());
     ui::SetUpInputMethodFactoryForTesting();
     focus_controller_.reset(new TestFocusController(root_window()));
     proxy_ = new TestKeyboardControllerProxy();