Merge 97351 - REGRESSION(r89915): <input type=email multiple> don't show the default value

Merge 97351 - REGRESSION(r89915): <input type=email multiple> don't show the default value
https://bugs.webkit.org/show_bug.cgi?id=69895

Reviewed by Hajime Morita.

Source/WebCore:

m_valueIfDirty became unexpectedly empty because
EmailInputType::sanitizeValue() returned an empty string for a
null input string.

To solve this issue, HTMLInputElement::sanitizeValue() checks
nullness, and remove the null check of sanitizeValue() of
InputType subclasses.
Also, we make InputType::sanitizeValue() const.

* html/ColorInputType.cpp:
(WebCore::ColorInputType::sanitizeValue):
- Make this const.
- Remove null check.
* html/ColorInputType.h: Make sanitizeValue() const.
* html/EmailInputType.cpp:
(WebCore::EmailInputType::sanitizeValue): Make this const.
* html/EmailInputType.h: Make sanitizeValue() const.
* html/HTMLInputElement.cpp:
(WebCore::HTMLInputElement::sanitizeValue):
(WebCore::HTMLInputElement::updateValueIfNeeded):
* html/InputType.cpp:
(WebCore::InputType::sanitizeValue):
Returns a null string if the input string is null, and
don't call InputType::sanitizeValue() in this case.
* html/InputType.h: Make sanitizeValue() const.
* html/NumberInputType.cpp:
(WebCore::NumberInputType::sanitizeValue): Make this const.
* html/NumberInputType.h: Make sanitizeValue() const.
* html/RangeInputType.cpp:
(WebCore::RangeInputType::sanitizeValue):
- Make this const.
- Remove null check.
* html/RangeInputType.h: Make sanitizeValue() const.
* html/TextFieldInputType.cpp:
(WebCore::TextFieldInputType::sanitizeValue): Make this const.
* html/TextFieldInputType.h: Make sanitizeValue() const.

LayoutTests:

* fast/forms/input-value-sanitization-expected.txt:
* fast/forms/input-value-sanitization.html:

TBR=tkent@chromium.org
BUG=http://code.google.com/p/chromium/issues/detail?id=99829
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=97689