[metrics] Update metrics to build against libchrome-180609

base/eintr_wrapper.h moved to base/posix/eintr_wrapper.h

CQ-DEPEND=Ib19c1382ab28ae7632728aa672478da2feb3950e

BUG=chromium-os:38941
TEST=emerge the metrics package with tests enabled.
STATUS=Fixed

Change-Id: I5d72d8934930ce394786ee151fd8f390b5caf2e1
Reviewed-on: https://gerrit.chromium.org/gerrit/43297
Tested-by: Chris Masone <cmasone@chromium.org>
Reviewed-by: Luigi Semenzato <semenzato@chromium.org>
Commit-Queue: Chris Masone <cmasone@chromium.org>
diff --git a/metrics/counter_test.cc b/metrics/counter_test.cc
index 71fefd6..73a50db 100644
--- a/metrics/counter_test.cc
+++ b/metrics/counter_test.cc
@@ -4,9 +4,9 @@
 
 #include <sys/file.h>
 
-#include <base/eintr_wrapper.h>
 #include <base/file_util.h>
 #include <base/logging.h>
+#include <base/posix/eintr_wrapper.h>
 #include <base/string_util.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>