[WIP] ash/extensions: Add experimental extension support for window-management in ash.

chrome/browser/extensions/event_names.cc

Index: chrome/browser/extensions/event_names.cc
diff --git a/chrome/browser/extensions/event_names.cc b/chrome/browser/extensions/event_names.cc
index 93d4b84c0218567cea895fff5339ad4915501a83..014860c890653d563219f87a2c807746a9809a53 100644
--- a/chrome/browser/extensions/event_names.cc
+++ b/chrome/browser/extensions/event_names.cc
@@ -68,6 +68,15 @@ const char kBluetoothOnPowerChanged[] =
     "experimental.bluetooth.onPowerChanged";
 #endif
 
+#if defined(USE_ASH)
+const char kAshWmOnWindowCreated[] = "experimental.wm.onWindowCreated";
+const char kAshWmOnWindowClosed[] = "experimental.wm.onWindowClosed";
+const char kAshWmOnWindowHidden[] = "experimental.wm.onWindowHidden";
+const char kAshWmOnWindowShown[] = "experimental.wm.onWindowShown";
+const char kAshWmOnActiveWindowChanged[] =
+    "experimental.wm.onActiveWindowChanged";
+#endif
+
 const char kOnPushMessage[] = "experimental.pushMessaging.onMessage";
 
 }  // namespace event_names