Transfer date/time value to chooser as double

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

Index: content/public/android/java/src/org/chromium/content/browser/input/TwoFieldDatePicker.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/input/TwoFieldDatePicker.java b/content/public/android/java/src/org/chromium/content/browser/input/TwoFieldDatePicker.java
index 8b90c9cbb6fade2a2eb8774c322542433c9a73fb..81d1eb9b1c709462da0ed08a1bcf6126f7445fa7 100644
--- a/content/public/android/java/src/org/chromium/content/browser/input/TwoFieldDatePicker.java
+++ b/content/public/android/java/src/org/chromium/content/browser/input/TwoFieldDatePicker.java
@@ -15,6 +15,7 @@ import android.widget.NumberPicker.OnValueChangeListener;
 import org.chromium.content.R;
 
 import java.util.Calendar;
+import java.util.TimeZone;
 
 /**
  * This class is heavily based on android.widget.DatePicker.
@@ -51,7 +52,7 @@ public abstract class TwoFieldDatePicker extends FrameLayout {
         void onMonthOrWeekChanged(TwoFieldDatePicker view, int year, int positionInYear);
     }
 
-    public TwoFieldDatePicker(Context context, long minValue, long maxValue) {
+    public TwoFieldDatePicker(Context context, double minValue, double maxValue) {
         super(context, null, android.R.attr.datePickerStyle);
 
         LayoutInflater inflater = (LayoutInflater) context
@@ -86,11 +87,11 @@ public abstract class TwoFieldDatePicker extends FrameLayout {
             }
         };
 
-        mCurrentDate = Calendar.getInstance();
+        mCurrentDate = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
         if (minValue >= maxValue) {
-            mMinDate = Calendar.getInstance();
+            mMinDate = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
             mMinDate.set(0, 0, 1);
-            mMaxDate = Calendar.getInstance();
+            mMaxDate = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
             mMaxDate.set(9999, 0, 1);
         } else {
             mMinDate = createDateFromValue(minValue);
@@ -132,7 +133,12 @@ public abstract class TwoFieldDatePicker extends FrameLayout {
      * Subclasses know the semantics of @value, and need to return
      * a Calendar corresponding to it.
      */
-    protected abstract Calendar createDateFromValue(long value);
+    protected abstract Calendar createDateFromValue(double value);
+
+    /**
+     * Converts the date to a number as defined by the HTML spec.
+     */
+    protected abstract double valueFromDate(int year, int positionInYear);
 
     /**
      * Updates the current date.
@@ -183,6 +189,13 @@ public abstract class TwoFieldDatePicker extends FrameLayout {
     }
 
     /**
+     * @return The selected value.
+     */
+    public double getValue() {
+        return valueFromDate(getYear(), getPositionInYear());
+    }
+
+    /**
      * @return The selected month or week.
      */
     public abstract int getPositionInYear();