Adds views::corewm::WMState to install common state

chrome/test/base/view_event_test_base.h

Index: chrome/test/base/view_event_test_base.h
diff --git a/chrome/test/base/view_event_test_base.h b/chrome/test/base/view_event_test_base.h
index 90595944ec9e62feb411807c5666af1b437e6836..397c9adbf2e01289f9179fc6bba49a45e6fa7fbd 100644
--- a/chrome/test/base/view_event_test_base.h
+++ b/chrome/test/base/view_event_test_base.h
@@ -34,6 +34,12 @@ namespace gfx {
 class Size;
 }
 
+namespace views {
+namespace corewm {
+class WMState;
+}
+}
+
 // Base class for Views based tests that dispatch events.
 //
 // As views based event test involves waiting for events to be processed,
@@ -150,6 +156,7 @@ class ViewEventTestBase : public views::WidgetDelegate,
 
 #if defined(USE_AURA)
   scoped_ptr<aura::test::AuraTestHelper> aura_test_helper_;
+  scoped_ptr<views::corewm::WMState> wm_state_;
 #endif
 
   ChromeViewsDelegate views_delegate_;