Reviewed by Adam Barth.

        Implement IDBKeyPath parser.
        https://bugs.webkit.org/show_bug.cgi?id=42976

        IDBKeyPath is an internal class, exposed only for unit tests for now.
        It'll allow indexed database implementation to traverse a given key path and obtain the corresponding properties
        from a SerializedScriptValue.

        * WebCore.gypi:
        * storage/IDBKeyPath.cpp: Added.
        (WebCore::IDBKeyPath::create):
        (WebCore::IDBKeyPath::IDBKeyPath):
        (WebCore::IDBKeyPath::~IDBKeyPath):
        (WebCore::IDBKeyPath::hasNext):
        (WebCore::IDBKeyPath::next):
        (WebCore::IDBKeyPath::identifier):
        (WebCore::IDBKeyPath::hasIndex):
        (WebCore::IDBKeyPath::indexValue):
        (WebCore::IDBKeyPath::parserError):
        (WebCore::IDBKeyPath::parse):
        (WebCore::IDBKeyPath::Lexer::lex):
        (WebCore::isSafeIdentifierStartCharacter):
        (WebCore::isSafeIdentifierCharacter):
        (WebCore::IDBKeyPath::Lexer::lexIdentifier):
        (WebCore::IDBKeyPath::Lexer::lexNumber):
        * storage/IDBKeyPath.h: Added.
        (WebCore::IDBKeyPath::Token::Token):
        (WebCore::IDBKeyPath::):
        (WebCore::IDBKeyPath::Lexer::Lexer):
        (WebCore::IDBKeyPath::Lexer::next):
        (WebCore::IDBKeyPath::Lexer::currentToken):
2010-07-28  Marcus Bulach  <bulach@chromium.org>

        Reviewed by Adam Barth.

        Implement IDBKeyPath parser.
        https://bugs.webkit.org/show_bug.cgi?id=42976

        IDBKeyPath is an internal class, exposed only for unit tests for now.
        It'll allow indexed database implementation to traverse a given key path and obtain the corresponding properties
        from a SerializedScriptValue.

        * WebKit.gyp:
        * tests/IDBKeyPathTest.cpp: Added.
        (WebCore::ExpectedToken::ExpectedToken):
        (WebCore::checkKeyPath):
        (WebCore::TEST):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@65417 268f45cc-cd09-0410-ab3c-d52691b4dbfc