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

ui/views/corewm/focus_controller_unittest.cc

Index: ui/views/corewm/focus_controller_unittest.cc
diff --git a/ui/views/corewm/focus_controller_unittest.cc b/ui/views/corewm/focus_controller_unittest.cc
index cfccd056c978d063df9530e61aa50b789bd4fb4a..0632fa356e052143b6b4626b6790ed4af77feeed 100644
--- a/ui/views/corewm/focus_controller_unittest.cc
+++ b/ui/views/corewm/focus_controller_unittest.cc
@@ -20,6 +20,7 @@
 #include "ui/aura/window_tracker.h"
 #include "ui/events/event_handler.h"
 #include "ui/views/corewm/base_focus_rules.h"
+#include "ui/views/corewm/wm_state.h"
 
 namespace views {
 namespace corewm {
@@ -274,6 +275,7 @@ class FocusControllerTestBase : public aura::test::AuraTestBase {
 
   // Overridden from aura::test::AuraTestBase:
   virtual void SetUp() OVERRIDE {
+    wm_state_.reset(new views::corewm::WMState);
     // FocusController registers itself as an Env observer so it can catch all
     // window initializations, including the root_window()'s, so we create it
     // before allowing the base setup.
@@ -320,6 +322,7 @@ class FocusControllerTestBase : public aura::test::AuraTestBase {
     aura::test::AuraTestBase::TearDown();
     test_focus_rules_ = NULL;  // Owned by FocusController.
     focus_controller_.reset();
+    wm_state_.reset();
   }
 
   void FocusWindow(aura::Window* window) {
@@ -371,6 +374,7 @@ class FocusControllerTestBase : public aura::test::AuraTestBase {
  private:
   scoped_ptr<FocusController> focus_controller_;
   TestFocusRules* test_focus_rules_;
+  scoped_ptr<views::corewm::WMState> wm_state_;
 
   DISALLOW_COPY_AND_ASSIGN(FocusControllerTestBase);
 };