Switch users of foundation_util.h to include it directly and clean up uses of mac_util.h.

pdf/out_of_process_instance.cc

Index: pdf/out_of_process_instance.cc
diff --git a/pdf/out_of_process_instance.cc b/pdf/out_of_process_instance.cc
index 9dcf4d9aa33833643d0b9a219f3e4df1287013d2..34ed32abdc160ca5df9d2987e1a3bbdd3f4a5f28 100644
--- a/pdf/out_of_process_instance.cc
+++ b/pdf/out_of_process_instance.cc
@@ -42,10 +42,6 @@
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "v8/include/v8.h"
 
-#if defined(OS_MACOSX)
-#include "base/mac/mac_util.h"
-#endif
-
 namespace chrome_pdf {
 
 const char kChromePrint[] = "chrome://print/";