gobi-cromo-plugin: Update to build against libchrome-271506.

BUG=chromium:375032
TEST=`FEATURES=test emerge-$BOARD gobi-cromo-plugin`

Change-Id: If05900d1be6a5ab13cfca162a1cec0884c518c0a
Reviewed-on: https://chromium-review.googlesource.com/201185
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
diff --git a/Makefile b/Makefile
index 997efd5..6000e84 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-BASE_VER ?= 242728
+BASE_VER ?= 271506
 
 PKG_CONFIG ?= pkg-config
 PC_DEPS = dbus-c++-1 glib-2.0 libchrome-$(BASE_VER)
diff --git a/gobi_cdma_modem.cc b/gobi_cdma_modem.cc
index f1fb86f..2e99486 100644
--- a/gobi_cdma_modem.cc
+++ b/gobi_cdma_modem.cc
@@ -844,7 +844,7 @@
 void GobiCdmaModem::MarkForExecPostActivationStepsAfterReset() {
   // This is a best effort attempt to write out the cookie crumb so don't
   // need to check for write failures.
-  file_util::WriteFile(GetExecPostActivationStepsCookieCrumbPath(), "", 0);
+  base::WriteFile(GetExecPostActivationStepsCookieCrumbPath(), "", 0);
 }
 
 bool GobiCdmaModem::ShouldExecPostActivationSteps() const {