`#pragma once` for app, base, chrome, gfx, ipc, net, skia, views
BUG=50273
TEST=everything still builds, build is 10% faster on windows, same speed on mac/linux
TBR: erg
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@53716 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/notifications/balloon_collection_impl.h b/chrome/browser/notifications/balloon_collection_impl.h
index cb06230..d1307355 100644
--- a/chrome/browser/notifications/balloon_collection_impl.h
+++ b/chrome/browser/notifications/balloon_collection_impl.h
@@ -6,6 +6,7 @@
#ifndef CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_IMPL_H_
#define CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_IMPL_H_
+#pragma once
#include <deque>