https://bugs.webkit.org/show_bug.cgi?id=93683

Patch by Benjamin Poulain <bpoulain@apple.com> on 2012-08-11
Reviewed by Andreas Kling.

Source/WebCore: 

Numbers converted to string for CSS are unlikely to ever be concatenated with a 16bits string.
This patch change the conversion to be done to 8bits string in order to reduce memory allocations.

* css/CSSPrimitiveValue.cpp:
(WebCore::formatNumber):
* inspector/InspectorValues.cpp:
(WebCore::InspectorBasicValue::writeJSON):
* platform/graphics/Color.cpp:
(WebCore::Color::serialized): Instead of allocating a static WTF::String, we can simply append the
string literal to the output vector.

Source/WTF: 

Modify DecimalNumber to do the conversion to string on LChar instead of UChar.

* wtf/DecimalNumber.cpp:
(WTF::DecimalNumber::toStringDecimal):
(WTF::DecimalNumber::toStringExponential):
* wtf/DecimalNumber.h:
(DecimalNumber):
* wtf/dtoa.h:
* wtf/text/StringBuffer.h:
(WTF::StringBuffer::operator[]): StringBuffer::operator[] was incorrectly typed to UChar, making
the method impossible to instanciate with LChar.
* wtf/text/WTFString.h:
(String):
(WTF::String::adopt): String::adopt() is modified to work with both LChar and UChar. StringImpl
already support that.
(WTF::appendNumber): Add support for any type that can instanciate the template.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@125357 268f45cc-cd09-0410-ab3c-d52691b4dbfc