Reviewed by Eric.

	- added a new HashCountedSet class for the common pattern of mapping items to counts that can change

        * kxmlcore/HashCountedSet.h: Added.
        (KXMLCore::HashCountedSet::*): Implemented, on top of HashMap.
        * kxmlcore/HashMap.h:
        (KXMLCore::HashMap::add): New method - does not replace existing value if key already present
	but otherwise like set().
        (KXMLCore::HashMap::set): Improved comments.
        * kxmlcore/HashMapPtrSpec.h:
        (KXMLCore::HashMap::add): Added to specializations too.
        * JavaScriptCore.xcodeproj/project.pbxproj: Add new  file.
        * kxmlcore/HashFunctions.h: Added include of stdint.h

	- replaced the custom hashtable for values protected from GC with HashCountedSet

        * kjs/collector.cpp:
        (KJS::Collector::protect): Moved code here from ProtectedValues::increaseProtectCount
	since the code is so simple now.
        (KJS::Collector::unprotect): Ditto for ProtectedValues::decreaseProtectCount.
        (KJS::Collector::markProtectedObjects): Updated for new way of doing things, now
	simpler and safer.
        (KJS::Collector::numReferencedObjects): ditto
        (KJS::Collector::rootObjectClasses): ditto
        * kjs/collector.h: Added protect and unprotect static methods
        * kjs/protect.h:
        (KJS::gcProtect): Updated for removal of ProtectedValues class
        (KJS::gcUnprotect): likewise
        * kjs/protected_values.cpp: Removed.
        * kjs/protected_values.h: Removed.

WebCore:

        Reviewed by Eric.

        - updated for new HashCountedSet class

        * ForwardingHeaders/kxmlcore/HashCountedSet.h: Added forwarding header.
        * khtml/ecma/kjs_binding.cpp: Moved #define to disable pointer specialization higher
	in the file.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@11561 268f45cc-cd09-0410-ab3c-d52691b4dbfc