Merge 135131 - input.value="" should clear date/time input elements with partial values

LayoutTests/platform/qt/TestExpectations

 # These are the layout test expectations for the Qt port of WebKit.
 #
 # See http://trac.webkit.org/wiki/TestExpectations for more information on this file.
 
 # =========================================================================== #
 #       Entries merged in from the old Skipped file                           #
 # =========================================================================== #
 
 # =========================================================================== #
 # Categories of Skipped Tests                                                 #
@@ skipping 435 matching lines @@
 fast/js/names.html
 
 # Don't have GestureTapCancel event type
 touchadjustment/touch-links-active.html
 
 # ENABLE(HIDDEN_PAGE_DOM_TIMER_THROTTLING) is disabled
 fast/dom/timer-throttling-hidden-page.html
 
 # ENABLE(INPUT_MULTIPLE_FIELDS_UI) is disabled
 fast/forms/date-multiple-fields
+fast/forms/datetime-multiple-fields
+fast/forms/datetimelocal-multiple-fields
 fast/forms/month-multiple-fields
 fast/forms/time-multiple-fields
 fast/forms/week-multiple-fields
 
 # ENABLE(DRAGGABLE_REGION) is disabled
 fast/css/draggable-region-parser.html
 
 # Text Autosizing is not enabled.
 webkit.org/b/84186 fast/text-autosizing
 
@@ skipping 2018 matching lines @@
 webkit.org/b/99306 animations/missing-values-first-keyframe.html [ ImageOnlyFailure ]
 webkit.org/b/99306 animations/missing-values-last-keyframe.html [ ImageOnlyFailure ]
 webkit.org/b/99306 animations/opacity-transform-animation.html [ ImageOnlyFailure ]
 webkit.org/b/99306 css3/filters/effect-blur-hw.html [ ImageOnlyFailure ] # Blur effect radius is too small on WebKit1, the effect not applied at all on WebKit2.
 
 # REGRESSION(r132143): It made fast/xmlhttprequest/xmlhttprequest-recursive-sync-event.html flakey
 webkit.org/b/100117 fast/xmlhttprequest/xmlhttprequest-recursive-sync-event.html
 
 # [Qt] New http/tests/inspector/network/image-as-text-loading-data-url.html fails
 webkit.org/b/100196 http/tests/inspector/network/image-as-text-loading-data-url.html