Reviewed by Pavel Feldman.

        Web Inspector: Employ TextPrompt for CSS property name/value autocompletion
        https://bugs.webkit.org/show_bug.cgi?id=52212

        WebInspector.CSSKeywordCompletions contains a hand-written list of accepted CSS property value keywords
        for each property. WebInspector.TextPrompt is used to suggest both the name and value keywords while
        editing styles, in place of the old custom suggestion code.

        WebCore:
        * inspector/front-end/CSSCompletions.js:
        (WebInspector.CSSCompletions.prototype.startsWith): Fix array-out-of-bounds error.
        * inspector/front-end/CSSKeywordCompletions.js: Added.
        (WebInspector.CSSKeywordCompletions.forProperty):
        * inspector/front-end/StylesSidebarPane.js:
        (WebInspector.StylePropertyTreeElement.prototype.updateTitle):
        (WebInspector.StylePropertyTreeElement.prototype):
        ():
        * inspector/front-end/TextPrompt.js:
        (WebInspector.TextPrompt):
        (WebInspector.TextPrompt.prototype.removeFromElement):
        (WebInspector.TextPrompt.prototype._onKeyDown):
        (WebInspector.TextPrompt.prototype.tabKeyPressed):
        (WebInspector.TextPrompt.prototype.upKeyPressed):
        (WebInspector.TextPrompt.prototype.downKeyPressed):
        (WebInspector.TextPrompt.prototype._moveBackInHistory):
        (WebInspector.TextPrompt.prototype._moveForwardInHistory):
        * inspector/front-end/inspector.css:
        (.auto-complete-text, .editing .auto-complete-text):
        * inspector/front-end/inspector.html:

        LayoutTests:
        * inspector/styles-add-blank-property.html: Follow the altered event handling.
        * inspector/styles-url-linkify.html: Eliminate flakiness.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76116 268f45cc-cd09-0410-ab3c-d52691b4dbfc