Switch to standard integer types in base/files/.

base/files/file_enumerator_posix.cc

Index: base/files/file_enumerator_posix.cc
diff --git a/base/files/file_enumerator_posix.cc b/base/files/file_enumerator_posix.cc
index 7533a24c3527a58dc8b32c7d4bfd2253db4424cf..fb4010aadcad566f304a899344f1cb892b666081 100644
--- a/base/files/file_enumerator_posix.cc
+++ b/base/files/file_enumerator_posix.cc
@@ -7,9 +7,11 @@
 #include <dirent.h>
 #include <errno.h>
 #include <fnmatch.h>
+#include <stdint.h>
 
 #include "base/logging.h"
 #include "base/threading/thread_restrictions.h"
+#include "build/build_config.h"
 
 namespace base {
 
@@ -27,7 +29,7 @@ FilePath FileEnumerator::FileInfo::GetName() const {
   return filename_;
 }
 
-int64 FileEnumerator::FileInfo::GetSize() const {
+int64_t FileEnumerator::FileInfo::GetSize() const {
   return stat_.st_size;
 }