Makes ash/mus use RootWindowControllerCommon

ash/common/shell_window_ids.h

Index: ash/common/shell_window_ids.h
diff --git a/ash/common/shell_window_ids.h b/ash/common/shell_window_ids.h
index 5ee79e8c6a967b9e983dfafeacc18717cda486f6..24ce1b03df66a6675b52ef8c5b0387c13dfd1bd0 100644
--- a/ash/common/shell_window_ids.h
+++ b/ash/common/shell_window_ids.h
@@ -5,10 +5,17 @@
 #ifndef ASH_COMMON_SHELL_WINDOW_IDS_H_
 #define ASH_COMMON_SHELL_WINDOW_IDS_H_
 
+#include <stddef.h>
+
+#include "ash/ash_export.h"
+
 // Declarations of ids of special shell windows.
 
 namespace ash {
 
+// Used to indicate no shell window id.
+const int kShellWindowId_Invalid = -1;
+
 // A higher-level container that holds all of the containers stacked below
 // kShellWindowId_LockScreenContainer.  Only used by PowerButtonController for
 // animating lower-level containers.
@@ -33,6 +40,7 @@ const int kShellWindowId_UnparentedControlContainer = 3;
 const int kShellWindowId_DesktopBackgroundContainer = 4;
 
 // The virtual keyboard container.
+// NOTE: this is lazily created.
 const int kShellWindowId_VirtualKeyboardContainer = 5;
 
 // The container for standard top-level windows.
@@ -99,6 +107,14 @@ const int kShellWindowId_MouseCursorContainer = 24;
 // The topmost container, used for power off animation.
 const int kShellWindowId_PowerButtonAnimationContainer = 25;
 
+const int kShellWindowId_Min = 0;
+const int kShellWindowId_Max = kShellWindowId_PowerButtonAnimationContainer;
+
+// These are the list of container ids of containers which may contain windows
+// that need to be activated.
+ASH_EXPORT extern const int kActivatableShellWindowIds[];
+ASH_EXPORT extern const size_t kNumActivatableShellWindowIds;
+
 }  // namespace ash
 
 #endif  // ASH_COMMON_SHELL_WINDOW_IDS_H_