https://bugs.webkit.org/show_bug.cgi?id=98481

Reviewed by Hajime Morita.

Source/WebCore:

We can't assume a placeholder text is shorter than the width of
digits. The placeholder string for the year field of
input[type=week] is "----", but input[type=date] will have a
localized string for it.

We should set the 'width' CSS property to the maximum of the
placeholder width and the maximum value width in order to prevent
the field width from growing/narrowing.

Before this patch, we secured four digits space for a year field,
and allowed the field to grow its width when a larger year is
set. After this patch, we don't allow it to grow because the
'width' property is set to the maximum width.

Update week-multiple-fields-appearance-basic.html, and the
following tests are affected.
- fast/forms/week-multiple-fields/week-multiple-fields-appearance-pseudo-classes.html
- fast/forms/week-multiple-fields/week-multiple-fields-appearance-pseudo-elements.html
- fast/forms/week-multiple-fields/week-multiple-fields-appearance-style.html

* html/shadow/DateTimeNumericFieldElement.cpp:
(WebCore::DateTimeNumericFieldElement::DateTimeNumericFieldElement):
Enable customStyleForRenderer.
(WebCore::DateTimeNumericFieldElement::customStyleForRenderer):
Added. The code is similar to DateTimeSymbolicFieldElement::customStyleForRenderer().
(WebCore::DateTimeNumericFieldElement::formatValue):
Made a function with the code in value(). This is used in
customStyleForRenderer() and value().
(WebCore::DateTimeNumericFieldElement::value): Use formatValue().
* html/shadow/DateTimeNumericFieldElement.h:
(DateTimeNumericFieldElement): Declare new functions.

LayoutTests:

Update a test and test expectations.

* fast/forms/week-multiple-fields/week-multiple-fields-appearance-basic-expected.txt:
* fast/forms/week-multiple-fields/week-multiple-fields-appearance-basic.html:
* platform/chromium-mac/fast/forms/week-multiple-fields/week-multiple-fields-appearance-basic-expected.png:
* platform/chromium-mac/fast/forms/week-multiple-fields/week-multiple-fields-appearance-pseudo-classes-expected.png:
* platform/chromium-mac/fast/forms/week-multiple-fields/week-multiple-fields-appearance-pseudo-elements-expected.png:
* platform/chromium-mac/fast/forms/week-multiple-fields/week-multiple-fields-appearance-style-expected.png:
* platform/chromium/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@130477 268f45cc-cd09-0410-ab3c-d52691b4dbfc