Remove remote tree host and some related input and metro_driver code

chrome/browser/plugins/plugin_infobar_delegates.cc

Index: chrome/browser/plugins/plugin_infobar_delegates.cc
diff --git a/chrome/browser/plugins/plugin_infobar_delegates.cc b/chrome/browser/plugins/plugin_infobar_delegates.cc
index 95892d2f5ac3b34b1f126f5e5abfd55bb6656439..873a9fb80e300a11da79700dccd61f71c84dda69 100644
--- a/chrome/browser/plugins/plugin_infobar_delegates.cc
+++ b/chrome/browser/plugins/plugin_infobar_delegates.cc
@@ -36,10 +36,6 @@
 #if defined(OS_WIN)
 #include <shellapi.h>
 #include "ui/base/win/shell.h"
-
-#if defined(USE_AURA)
-#include "ui/aura/remote_window_tree_host_win.h"
-#endif
 #endif
 
 using base::UserMetricsAction;