Set the Gregorian changeover date to the beginning of time in Intl

ECMAScript dates act as if the Gregorian changeover happened at the
beginning of time. This patch fixes up internationalized date
formatting to set that changeover properly, as opposed to the ICU
default which is in the 16th century.

BUG=chromium:537382
R=adamk,cira
LOG=Y

Review URL: https://codereview.chromium.org/1501113002

Cr-Commit-Position: refs/heads/master@{#32669}

src/i18n.cc

@@ -16,6 +16,7 @@
 #include "unicode/decimfmt.h"
 #include "unicode/dtfmtsym.h"
 #include "unicode/dtptngen.h"
+#include "unicode/gregocal.h"
 #include "unicode/locid.h"
 #include "unicode/numfmt.h"
 #include "unicode/numsys.h"
@@ -96,6 +97,16 @@ icu::SimpleDateFormat* CreateICUDateFormat(
   icu::Calendar* calendar =
       icu::Calendar::createInstance(tz, icu_locale, status);
 
+  if (calendar->getDynamicClassID() ==
+      icu::GregorianCalendar::getStaticClassID()) {
+    icu::GregorianCalendar* gc = (icu::GregorianCalendar*)calendar;
+    UErrorCode status = U_ZERO_ERROR;
+    // The beginning of ECMAScript time, namely -(2**53)
+    const double start_of_time = -9007199254740992;
+    gc->setGregorianChange(start_of_time, status);
+    DCHECK(U_SUCCESS(status));
+  }
+
   // Make formatter from skeleton. Calendar and numbering system are added
   // to the locale as Unicode extension (if they were specified at all).
   icu::SimpleDateFormat* date_format = NULL;

test/intl/date-format/format-test.js

@@ -44,3 +44,7 @@ invalidValues.forEach(function(value) {
   assertTrue(error !== undefined);
   assertEquals('RangeError', error.name);
 });
+
+// https://code.google.com/p/chromium/issues/detail?id=537382
+
+assertEquals('11/11/1500', dtf.format(new Date(1500,10,11,12,0,0)));

test/test262/test262.status

@@ -404,10 +404,8 @@
   'intl402/DateTimeFormat/12.1.2': [PASS, FAIL],
   'intl402/DateTimeFormat/12.1.2.1_4': [FAIL],
   'intl402/DateTimeFormat/12.2.3_b': [FAIL],
-  'intl402/DateTimeFormat/prototype/12.3.2_FDT_7_a_iv': [FAIL],
   'intl402/DateTimeFormat/prototype/12.3.3': [FAIL],
   'intl402/DateTimeFormat/prototype/12.3_a': [FAIL],
-  'intl402/DateTimeFormat/prototype/format/12.3.2_FDT_7_a_iv': [FAIL],
   'intl402/Number/prototype/toLocaleString/13.2.1_5': [PASS, FAIL],
   'intl402/NumberFormat/11.1.1_20_c': [FAIL],
   'intl402/NumberFormat/11.1.1_a': [FAIL],