shill: Update to build against libchrome-242728.

BUG=chromium:341521
CQ-DEPEND=CL:193660
TEST=Tested the following:
1. `FEATURES=test USE='cellular wimax' emerge-$BOARD platform2`
2. Run the following tests:
   - network_3GSmokeTest
   - network_VPNConnect.*
   - network_WiMaxSmoke
   - wifi_matfunc

Change-Id: Ic1553c182ab7a833a68c45f012f646b8930cb095
Reviewed-on: https://chromium-review.googlesource.com/193606
Reviewed-by: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
diff --git a/file_reader.cc b/file_reader.cc
index f670964..d0021a4 100644
--- a/file_reader.cc
+++ b/file_reader.cc
@@ -20,7 +20,7 @@
 }
 
 bool FileReader::Open(const FilePath &file_path) {
-  file_.reset(file_util::OpenFile(file_path, "rb"));
+  file_.reset(base::OpenFile(file_path, "rb"));
   return file_.get() != NULL;
 }