Remove TYPE_EXTENSION_APP. Experiment failed.

chrome/browser/chromeos/wm_overview_controller.cc

Index: chrome/browser/chromeos/wm_overview_controller.cc
diff --git a/chrome/browser/chromeos/wm_overview_controller.cc b/chrome/browser/chromeos/wm_overview_controller.cc
index 5e405209be2453b0cf1d1337300d009c7424825d..5200deee34c5cfd064bdeb26e6519aecf07b68bd 100644
--- a/chrome/browser/chromeos/wm_overview_controller.cc
+++ b/chrome/browser/chromeos/wm_overview_controller.cc
@@ -644,8 +644,7 @@ void WmOverviewController::AddAllBrowsers() {
     // Don't add a browser to the list if that type of browser doesn't
     // have snapshots in overview mode.
     if ((*iterator)->type() != Browser::TYPE_NORMAL &&
-        (*iterator)->type() != Browser::TYPE_APP &&
-        (*iterator)->type() != Browser::TYPE_EXTENSION_APP) {
+        (*iterator)->type() != Browser::TYPE_APP) {
       ++iterator;
       continue;
     }