Merge 136803

Merge 136803

> Source/WebCore: INPUT_MULTIPLE_FIELDS_UI: The hour, am/pm, millisecond fields should support read-only state correctly
> https://bugs.webkit.org/show_bug.cgi?id=104210
> 
> Reviewed by Kentaro Hara.
> 
> 1. The hour, am/pm, and millisecond fields should have CSS rules for
>    [readonly]. They should be gray when they are read-only.
> 2. The am/pm field should reject to set an empty value like other
>    numeric fields do.
> 
> Tests: Add test cases to fast/forms/time/time-appearance-basic.html.
> 
> * css/html.css: merge existing readonly rules, and add ampm, hour, and
> millisecond pseudo classes.
> * html/shadow/DateTimeSymbolicFieldElement.cpp:
> (WebCore::DateTimeSymbolicFieldElement::setEmptyValue):
> Reject to set empty value if it is read-only.
> 
> LayoutTests: INPUT_MULTIPLE_FIELDS_UI: The hour field and the am/pm field should support read-only state correctly
> https://bugs.webkit.org/show_bug.cgi?id=104210
> 
> Reviewed by Kentaro Hara.
> 
> * fast/forms/time/time-appearance-basic.html:
> Add test cases for step=86400 (24 hours)
> * platform/chromium-mac/fast/forms/time/time-appearance-basic-expected.png:
> * platform/chromium/TestExpectations:
> 

TBR=tkent@chromium.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=137100