update_engine: Add minutes variable to real time provider.

Make it so that the user can also get the current
minutes in local time from the real time provider.

BUG=chromium:852860
TEST=Real time provider unittests
Change-Id: I8118e28c5ab7f000434947fdee9aeae441535ba6
Reviewed-on: https://chromium-review.googlesource.com/1101468
Commit-Ready: Adolfo Higueros <adokar@google.com>
Tested-by: Adolfo Higueros <adokar@google.com>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
diff --git a/update_manager/fake_time_provider.h b/update_manager/fake_time_provider.h
index 2aea2e7..bd370d2 100644
--- a/update_manager/fake_time_provider.h
+++ b/update_manager/fake_time_provider.h
@@ -29,10 +29,12 @@
 
   FakeVariable<base::Time>* var_curr_date() override { return &var_curr_date_; }
   FakeVariable<int>* var_curr_hour() override { return &var_curr_hour_; }
+  FakeVariable<int>* var_curr_minute() override { return &var_curr_minute_; }
 
  private:
   FakeVariable<base::Time> var_curr_date_{"curr_date", kVariableModePoll};
   FakeVariable<int> var_curr_hour_{"curr_hour", kVariableModePoll};
+  FakeVariable<int> var_curr_minute_{"curr_minute", kVariableModePoll};
 
   DISALLOW_COPY_AND_ASSIGN(FakeTimeProvider);
 };