`#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/views/controls/scrollbar/scroll_bar.h b/views/controls/scrollbar/scroll_bar.h
index a4203d4..cd23a0f0 100644
--- a/views/controls/scrollbar/scroll_bar.h
+++ b/views/controls/scrollbar/scroll_bar.h
@@ -4,6 +4,7 @@
#ifndef VIEWS_CONTROLS_SCROLLBAR_SCROLLBAR_H_
#define VIEWS_CONTROLS_SCROLLBAR_SCROLLBAR_H_
+#pragma once
#include "views/event.h"
#include "views/view.h"
