Move DefaultActivationClient to wm/core

ui/wm/core/compound_event_filter_unittest.cc

Index: ui/wm/core/compound_event_filter_unittest.cc
diff --git a/ui/wm/core/compound_event_filter_unittest.cc b/ui/wm/core/compound_event_filter_unittest.cc
index aea992c457a881c6c66d613848785a3ae672a87a..afd3bcb5bd8870a9bf6fca18abdb8f938de4d4b6 100644
--- a/ui/wm/core/compound_event_filter_unittest.cc
+++ b/ui/wm/core/compound_event_filter_unittest.cc
@@ -14,6 +14,7 @@
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
+#include "ui/wm/core/default_activation_client.h"
 #include "ui/wm/public/activation_client.h"
 
 namespace {
@@ -112,6 +113,7 @@ TEST_F(CompoundEventFilterTest, CursorVisibilityChange) {
 #if defined(OS_CHROMEOS) || defined(OS_WIN)
 // Touch visually hides the cursor on ChromeOS and Windows.
 TEST_F(CompoundEventFilterTest, TouchHidesCursor) {
+  new wm::DefaultActivationClient(root_window());
   scoped_ptr<CompoundEventFilter> compound_filter(new CompoundEventFilter);
   aura::Env::GetInstance()->AddPreTargetHandler(compound_filter.get());
   aura::test::TestWindowDelegate delegate;