Allow POSIX callers to specify a new file's mode.

base/files/file_util_posix.cc

Index: base/files/file_util_posix.cc
diff --git a/base/files/file_util_posix.cc b/base/files/file_util_posix.cc
index 5a94cef661319e39b98ea10037113371b4a2d2ac..236927f012f62683c56ba5faecea3a6a8355410a 100644
--- a/base/files/file_util_posix.cc
+++ b/base/files/file_util_posix.cc
@@ -693,6 +693,19 @@ int WriteFile(const FilePath& filename, const char* data, int size) {
   return bytes_written;
 }
 
+bool WriteFileMode(const FilePath& filename, const char* data, int size,
+                   mode_t mode) {
+  ThreadRestrictions::AssertIOAllowed();
+  int fd = HANDLE_EINTR(creat(filename.value().c_str(), mode));
+  if (fd < 0)
+    return -1;

[rvargas (doing something else), 2014/10/21 01:05:53]

return false

[palmer, 2014/10/21 01:26:42]

Done.

+
+  bool status = WriteFileDescriptor(fd, data, size);
+  if (IGNORE_EINTR(close(fd)) < 0)

[rvargas (doing something else), 2014/10/21 01:05:53]

nit: Now that we are writing this function from scratch, we should use ScopedFD
instead.

[palmer, 2014/10/21 01:26:42]

Done.

+    return false;
+  return status;
+}
+
 bool WriteFileDescriptor(const int fd, const char* data, int size) {
   // Allow for partial writes.
   ssize_t bytes_written_total = 0;