Changed how Experimental annotation works. No longer is a constructor.

tools/dom/templates/html/impl/impl_HTMLInputElement.darttemplate

Index: tools/dom/templates/html/impl/impl_HTMLInputElement.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_HTMLInputElement.darttemplate b/tools/dom/templates/html/impl/impl_HTMLInputElement.darttemplate
index 9934b773ca601291b74f5df8668a7feec33ff5f5..deced63f3abccf74fd11f234913b51ff4a4e0bb0 100644
--- a/tools/dom/templates/html/impl/impl_HTMLInputElement.darttemplate
+++ b/tools/dom/templates/html/impl/impl_HTMLInputElement.darttemplate
@@ -309,7 +309,7 @@ abstract class RangeInputElementBase implements InputElementBase {
  * Use [supported] to check if this is supported on the current platform.
  */
 @SupportedBrowser(SupportedBrowser.CHROME, '25')
-@Experimental()
+@Experimental
 abstract class DateTimeInputElement implements RangeInputElementBase {
   factory DateTimeInputElement() => new InputElement(type: 'datetime');
 
@@ -334,7 +334,7 @@ abstract class DateTimeInputElement implements RangeInputElementBase {
  * Use [supported] to check if this is supported on the current platform.
  */
 @SupportedBrowser(SupportedBrowser.CHROME, '25')
-@Experimental()
+@Experimental
 abstract class DateInputElement implements RangeInputElementBase {
   factory DateInputElement() => new InputElement(type: 'date');
 
@@ -359,7 +359,7 @@ abstract class DateInputElement implements RangeInputElementBase {
  * Use [supported] to check if this is supported on the current platform.
  */
 @SupportedBrowser(SupportedBrowser.CHROME, '25')
-@Experimental()
+@Experimental
 abstract class MonthInputElement implements RangeInputElementBase {
   factory MonthInputElement() => new InputElement(type: 'month');
 
@@ -384,7 +384,7 @@ abstract class MonthInputElement implements RangeInputElementBase {
  * Use [supported] to check if this is supported on the current platform.
  */
 @SupportedBrowser(SupportedBrowser.CHROME, '25')
-@Experimental()
+@Experimental
 abstract class WeekInputElement implements RangeInputElementBase {
   factory WeekInputElement() => new InputElement(type: 'week');
 
@@ -409,7 +409,7 @@ abstract class WeekInputElement implements RangeInputElementBase {
  * Use [supported] to check if this is supported on the current platform.
  */
 @SupportedBrowser(SupportedBrowser.CHROME)
-@Experimental()
+@Experimental
 abstract class TimeInputElement implements RangeInputElementBase {
   factory TimeInputElement() => new InputElement(type: 'time');
 
@@ -435,7 +435,7 @@ abstract class TimeInputElement implements RangeInputElementBase {
  * Use [supported] to check if this is supported on the current platform.
  */
 @SupportedBrowser(SupportedBrowser.CHROME, '25')
-@Experimental()
+@Experimental
 abstract class LocalDateTimeInputElement implements RangeInputElementBase {
   factory LocalDateTimeInputElement() =>
       new InputElement(type: 'datetime-local');
@@ -458,7 +458,7 @@ abstract class LocalDateTimeInputElement implements RangeInputElementBase {
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.IE)
 @SupportedBrowser(SupportedBrowser.SAFARI)
-@Experimental()
+@Experimental
 abstract class NumberInputElement implements RangeInputElementBase {
   factory NumberInputElement() => new InputElement(type: 'number');
 
@@ -485,7 +485,7 @@ abstract class NumberInputElement implements RangeInputElementBase {
  */
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.IE, '10')
-@Experimental()
+@Experimental
 abstract class RangeInputElement implements RangeInputElementBase {
   factory RangeInputElement() => new InputElement(type: 'range');