Remove base_i18n dependency from //components/metrics:metrics target

components/metrics/daily_event.cc

Index: components/metrics/daily_event.cc
diff --git a/components/metrics/daily_event.cc b/components/metrics/daily_event.cc
index 42ba48c2784295e0b73fa87b5495dceefb6a6a4a..2ab549092513ed1d29b5303557a4a4a6f754e266 100644
--- a/components/metrics/daily_event.cc
+++ b/components/metrics/daily_event.cc
@@ -6,7 +6,6 @@
 
 #include <utility>
 
-#include "base/i18n/time_formatting.h"
 #include "base/metrics/histogram.h"
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/pref_service.h"
@@ -69,8 +68,7 @@ void DailyEvent::CheckInterval() {
     // The first time we call CheckInterval, we read the time stored in prefs.
     last_fired_ = base::Time::FromInternalValue(
         pref_service_->GetInt64(pref_name_));
-    DVLOG(1) << "DailyEvent time loaded: "
-             << base::TimeFormatShortDateAndTime(last_fired_);
+    DVLOG(1) << "DailyEvent time loaded: " << last_fired_;

[xunjieli, 2016/03/21 21:02:13]

base::Time converts to a UTC timestamp automatically.  Since it is only used in
debug logging, I guess it is fine ?

     if (last_fired_.is_null()) {
       DVLOG(1) << "DailyEvent first run.";
       RecordIntervalTypeHistogram(histogram_name_, FIRST_RUN);