Support datalist for date/time input types on Android

content/public/android/java/src/org/chromium/content/browser/input/MonthPicker.java

Index: content/public/android/java/src/org/chromium/content/browser/input/MonthPicker.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/input/MonthPicker.java b/content/public/android/java/src/org/chromium/content/browser/input/MonthPicker.java
index 57cab667619ff3b984818052c172ec1950a18988..79da411d68f6370b6b592cf6b6eb9f089e64afd2 100644
--- a/content/public/android/java/src/org/chromium/content/browser/input/MonthPicker.java
+++ b/content/public/android/java/src/org/chromium/content/browser/input/MonthPicker.java
@@ -10,6 +10,7 @@ import java.text.DateFormatSymbols;
 import java.util.Arrays;
 import java.util.Calendar;
 import java.util.Locale;
+import java.util.TimeZone;
 
 import org.chromium.content.R;
 
@@ -29,7 +30,7 @@ public class MonthPicker extends TwoFieldDatePicker {
                 DateFormatSymbols.getInstance(Locale.getDefault()).getShortMonths();
 
         // initialize to current date
-        Calendar cal = Calendar.getInstance();
+        Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
         init(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), null);
     }
 
@@ -37,15 +38,20 @@ public class MonthPicker extends TwoFieldDatePicker {
     protected Calendar createDateFromValue(long value) {
         int year = (int)Math.min(value / 12 + 1970, Integer.MAX_VALUE);
         int month = (int) (value % 12);
-        Calendar cal = Calendar.getInstance();
+        Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
         cal.clear();
         cal.set(year, month, 1);
         return cal;
     }
 
     @Override
+    protected long valueFromDate(int year, int month) {
+        return (year - 1970) * 12 + month;
+    }
+
+    @Override
     protected void setCurrentDate(int year, int month) {
-        Calendar date = Calendar.getInstance();
+        Calendar date = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
         date.set(year, month, 1);
         if (date.before(getMinDate())) {
             setCurrentDate(getMinDate());