https://bugs.webkit.org/show_bug.cgi?id=94187

Patch by Benjamin Poulain <bpoulain@apple.com> on 2012-08-17
Reviewed by Alexey Proskuryakov.

Previously, we would instanciate a new String every time a CSS property name was needed.

This patches moves the creation of the AtomicString to CSSPropertyNames and reuse that
StringImpl whenever needed.

With the patch, accessing CSS property names from JavaScript gets about 2.1 times faster.

* css/CSSComputedStyleDeclaration.cpp:
(WebCore::CSSComputedStyleDeclaration::getPropertyCSSValue):
(WebCore::CSSComputedStyleDeclaration::item):
* css/CSSPrimitiveValue.cpp:
(WebCore::valueOrPropertyName):
* css/CSSProperty.cpp:
(WebCore::CSSProperty::cssName):
* css/PropertySetCSSStyleDeclaration.cpp:
(WebCore::PropertySetCSSStyleDeclaration::item):
(WebCore::PropertySetCSSStyleDeclaration::getPropertyShorthand):
* css/makeprop.pl:
* inspector/InspectorCSSAgent.cpp:
(WebCore::InspectorCSSAgent::getSupportedCSSProperties):
* inspector/InspectorStyleSheet.cpp:
(WebCore::InspectorStyle::styleWithProperties):
* page/animation/ImplicitAnimation.cpp:
(WebCore::ImplicitAnimation::sendTransitionEvent):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@125934 268f45cc-cd09-0410-ab3c-d52691b4dbfc