Reviewed by Eric.

    Reviewed by Eric.

        - http://bugs.webkit.org/show_bug.cgi?id=16561
          remove debugger overhead from non-debugged JavaScript execution

        1.022x as fast on SunSpider.

        * JavaScriptCore.exp: Updated.

        * kjs/NodeInfo.h: Renamed SourceElementsStub to SourceElements,
        since that more accurately describes the role of this object, which
        is a reference-counted wrapper for a Vector.

        * kjs/Parser.cpp:
        (KJS::Parser::didFinishParsing): Changed parameter type to SourceElements,
        and use plain assignment instead of set.
        * kjs/Parser.h: Changed parameter type of didFinishParsing to a
        SourceElements. Also changed m_sourceElements; we now use a RefPtr instead
        of an OwnPtr as well.

        * kjs/grammar.y: Got rid of all the calls to release() on SourceElements.
        That's now handed inside the constructors for various node types, since we now
        use vector swapping instead.

        * kjs/nodes.cpp:
        (KJS::Node::rethrowException): Added NEVER_INLINE, because this was getting inlined
        and we want exception handling out of the normal code flow.
        (KJS::SourceElements::append): Moved here from the header. This now handles
        creating a BreakpointCheckStatement for each statement in the debugger case.
        That way we can get breakpoint handling without having it in every execute function.
        (KJS::BreakpointCheckStatement::BreakpointCheckStatement): Added.
        (KJS::BreakpointCheckStatement::execute): Added. Contains the code that was formerly
        in the StatementNode::hitStatement function and the KJS_BREAKPOINT macro.
        (KJS::BreakpointCheckStatement::streamTo): Added.
        (KJS::ArgumentListNode::evaluateList): Use KJS_CHECKEXCEPTIONVOID since the return
        type is void.
        (KJS::VarStatementNode::execute): Removed KJS_BREAKPOINT.
        (KJS::BlockNode::BlockNode): Changed parameter type to SourceElements.
        Changed code to use release since the class now contains a vector rather than
        a vector point.
        (KJS::BlockNode::optimizeVariableAccess): Updated since member is now a vector
        rather than a vector pointer.
        (KJS::BlockNode::execute): Ditto.
        (KJS::ExprStatementNode::execute): Removed KJS_BREAKPOINT.
        (KJS::IfNode::execute): Ditto.
        (KJS::IfElseNode::execute): Ditto.
        (KJS::DoWhileNode::execute): Ditto.
        (KJS::WhileNode::execute): Ditto.
        (KJS::ContinueNode::execute): Ditto.
        (KJS::BreakNode::execute): Ditto.
        (KJS::ReturnNode::execute): Ditto.
        (KJS::WithNode::execute): Ditto.
        (KJS::CaseClauseNode::optimizeVariableAccess): Updated since member is now a vector
        rather than a vector pointer.
        (KJS::CaseClauseNode::executeStatements): Ditto.
        (KJS::SwitchNode::execute): Removed KJS_BREAKPOINT.
        (KJS::ThrowNode::execute): Ditto.
        (KJS::TryNode::execute): Ditto.
        (KJS::ScopeNode::ScopeNode): Changed parameter type to SourceElements.
        (KJS::ProgramNode::ProgramNode): Ditto.
        (KJS::EvalNode::EvalNode): Ditto.
        (KJS::FunctionBodyNode::FunctionBodyNode): Ditto.
        (KJS::ScopeNode::optimizeVariableAccess): Updated since member is now a vector
        rather than a vector pointer.

        * kjs/nodes.h: Removed hitStatement. Renamed SourceElements to StatementVector.
        Renamed SourceElementsStub to SourceElements and made it derive from
        ParserRefCounted rather than from Node, hold a vector rather than a pointer to
        a vector, and changed the release function to swap with another vector rather
        than the pointer idiom. Updated BlockNode and CaseClauseNode to hold actual
        vectors instead of pointers to vectors. Added BreakpointCheckStatement.

        * kjs/nodes2string.cpp:
        (KJS::statementListStreamTo): Changed to work on a vector instead of a pointer
        to a vector.
        (KJS::BlockNode::streamTo): Ditto.
        (KJS::CaseClauseNode::streamTo):  Ditto.

        * wtf/AlwaysInline.h: Added NEVER_INLINE.
        * wtf/PassRefPtr.h: Tweaked formatting. Added clear() function that matches the
        ones in OwnPtr and auto_ptr.
        * wtf/RefPtr.h: Ditto.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@28937 268f45cc-cd09-0410-ab3c-d52691b4dbfc