https://bugs.webkit.org/show_bug.cgi?id=94290

Patch by Pablo Flouret <pablof@motorola.com> on 2012-10-16
Reviewed by Tony Chang.

.:

* Source/cmake/WebKitMacros.cmake:
    Use WebCore/css/makegrammar.pl to generate bison grammar files.

Source/WebCore:

Running CSSGrammar.y through a preprocessor allows the use of feature
defines in all places of the yacc file (i.e. not just in C blocks).
Mostly useful to be able to keep every part of a feature under feature
flags for self-documenting purposes.

No new tests, CSSGrammar.y should be generated correctly and everything
should keep working as before.

* CMakeLists.txt:
* DerivedSources.make:
* DerivedSources.pri:
* GNUmakefile.am:
    Modify build systems to use makegrammar.pl to generate the .y files
    and run those through bison.

* WebCore.gyp/WebCore.gyp:
    Add a new action to preprocess the CSSGrammar.y.in file before the
    bison rule is run.

* WebCore.vcproj/WebCore.vcproj:
* WebCore.xcodeproj/project.pbxproj:
    Add the new .y.in / .y.includes files.

* css/CSSGrammar.y.in: Renamed from Source/WebCore/css/CSSGrammar.y.
    Also moved the top declarations section that has includes, defines,
    etc. to its own file. These shouldn't be touched by the first
    pass of the preprocessor. And changed the existing ENABLE(FEATURE)
    ifdefs to ENABLE_FEATURE since the ENABLE() macro is not available
    yet.
* css/CSSGrammar.y.includes: Added.
    The aforementioned declarations header section. After the .y.in file
    is processed it will be concatenated with this one to make the
    CSSGrammar.y file.

* css/makegrammar.pl:
    Modify the script to handle .y.in files.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@131477 268f45cc-cd09-0410-ab3c-d52691b4dbfc