Simplify the transport dib situation across our various platforms, as a

ui/surface/transport_dib_sysvipc.cc

Index: ui/surface/transport_dib_sysvipc.cc
===================================================================
--- ui/surface/transport_dib_sysvipc.cc	(revision 192091)
+++ ui/surface/transport_dib_sysvipc.cc	(working copy)
@@ -4,6 +4,10 @@
 
 #include "ui/surface/transport_dib.h"
 
+// Desktop GTK Linux builds use the old-style SYSV SHM based DIBs.
+// Linux Aura and Chrome OS do too. This will change very soon.
+#if defined(TOOLKIT_GTK) || (defined(OS_LINUX) && defined(USE_AURA))
+
 #include <errno.h>
 #include <stdlib.h>
 #include <sys/ipc.h>
@@ -153,3 +157,6 @@
   if (!inflight_counter_)
     delete this;
 }
+
+#endif
+