DevTools: [CSSP] put -webkit properties to the end of the list.

LayoutTests/inspector/elements/styles-2/inject-stylesheet-expected.txt

 CONSOLE MESSAGE: line 10: iframe loaded
 Tests that injected user stylesheets are reflected in the Styles pane.
 
 
 Main frame style:
 background-attachment: scroll
     initial - #main inject-stylesheet.html:5 -> inject-stylesheet.html:5:3
 background-clip: border-box
     initial - #main inject-stylesheet.html:5 -> inject-stylesheet.html:5:3
 background-color: rgb(0, 0, 255)
     blue - #main inject-stylesheet.html:5 -> inject-stylesheet.html:5:3
 background-image: none
     initial - #main inject-stylesheet.html:5 -> inject-stylesheet.html:5:3
 background-origin: padding-box
     initial - #main inject-stylesheet.html:5 -> inject-stylesheet.html:5:3
 background-size: auto
     initial - #main inject-stylesheet.html:5 -> inject-stylesheet.html:5:3
--webkit-border-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAQAAAC1+jfqAAAAiElEQ…Ms+LS30CAhBN5nNxeT5hbJ1zwmji2k+aF6NENIPf/hs54f0sZFUVAMigAAAABJRU5ErkJggg==) 100% / 1 / 0px stretch
-    url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAQAAAC1+jfqAAAAiElEQ…Ms+LS30CAhBN5nNxeT5hbJ1zwmji2k+aF6NENIPf/hs54f0sZFUVAMigAAAABJRU5ErkJggg==) - #main injected stylesheet
 color: rgb(255, 0, 0)
     red - #main injected stylesheet
 display: block
     block - div user agent stylesheet
+-webkit-border-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAQAAAC1+jfqAAAAiElEQ…Ms+LS30CAhBN5nNxeT5hbJ1zwmji2k+aF6NENIPf/hs54f0sZFUVAMigAAAABJRU5ErkJggg==) 100% / 1 / 0px stretch
+    url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAQAAAC1+jfqAAAAiElEQ…Ms+LS30CAhBN5nNxeT5hbJ1zwmji2k+aF6NENIPf/hs54f0sZFUVAMigAAAABJRU5ErkJggg==) - #main injected stylesheet
 [expanded] 
 element.style  { ()
 
 [expanded] 
 media="screen" (inject-stylesheet.html)
 #main  { (inject-stylesheet.html:5 -> inject-stylesheet.html:5:3)
     background: blue;
         background-image: initial;
         background-position-x: initial;
         background-position-y: initial;
@@ skipping 78 matching lines @@
 [expanded] 
 body  { (user agent stylesheet)
     display: block;
     margin: 8px;
         margin-top: 8px;
         margin-right: 8px;
         margin-bottom: 8px;
         margin-left: 8px;