Need AtomicStrings for the various font family names
https://bugs.webkit.org/show_bug.cgi?id=28024

.:

* Source/cmake/WebKitMacros.cmake: Add new macro.

Source/WebCore:

Unify the usage of '-webkit' prefixed font family names by using
global AtomicStrings.
Use a .in file to generate the needed sources through make_names.pl.

No new tests needed.

* CMakeLists.txt:
* CodeGenerators.pri:
* DerivedSources.make:
* GNUmakefile.am:
* GNUmakefile.list.am:
* WebCore.gyp/WebCore.gyp:
* WebCore.gyp/scripts/action_makenames.py:
* WebCore.gypi:
* WebCore.vcproj/WebCore.vcproj:
* WebCore.xcodeproj/project.pbxproj:
* css/CSSComputedStyleDeclaration.cpp:
(WebCore::identifierForFamily):
* css/CSSFontSelector.cpp:
(WebCore::CSSFontSelector::addFontFaceRule):
(WebCore::fontDataForGenericFamily):
* css/CSSStyleSelector.cpp:
(WebCore::CSSStyleSelector::applyProperty):
* css/WebKitFontFamilyNames.in: Added.
* dom/make_names.pl:
* page/Frame.cpp:
(WebCore::Frame::Frame):
* platform/graphics/FontCache.cpp:
(WebCore::FontCache::getFontData):
* platform/graphics/FontDescription.h:
(WebCore::FontDescription::useFixedDefaultSize):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@93097 268f45cc-cd09-0410-ab3c-d52691b4dbfc