[CSS Grid Layout] Avoid using StyleAdjuster to resolve 'auto' values.

LayoutTests/fast/css/getComputedStyle/computed-style-without-renderer-listing-expected.txt

 This test documents all computed styles on a display: none element.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
 -webkit-app-region: no-drag
 -webkit-appearance: none
 -webkit-background-clip: border-box
 -webkit-background-composite: source-over
 -webkit-background-origin: padding-box
@@ skipping 56 matching lines @@
 -webkit-text-fill-color: rgb(0, 0, 0)
 -webkit-text-orientation: vertical-right
 -webkit-text-security: none
 -webkit-text-stroke-color: rgb(0, 0, 0)
 -webkit-text-stroke-width: 0px
 -webkit-user-drag: auto
 -webkit-user-modify: read-only
 -webkit-user-select: text
 -webkit-writing-mode: horizontal-tb
 align-content: start
-align-items: start
-align-self: start
+align-items: auto
+align-self: auto
 alignment-baseline: auto
 animation-delay: 0s
 animation-direction: normal
 animation-duration: 0s
 animation-fill-mode: none
 animation-iteration-count: 1
 animation-name: none
 animation-play-state: running
 animation-timing-function: ease
 backface-visibility: visible
@@ skipping 81 matching lines @@
 grid-column-start: auto
 grid-row-end: auto
 grid-row-start: auto
 grid-template-areas: none
 grid-template-columns: none
 grid-template-rows: none
 height: auto
 image-rendering: auto
 isolation: auto
 justify-content: start
-justify-items: start
-justify-self: start
+justify-items: auto
+justify-self: auto
 left: auto
 letter-spacing: normal
 lighting-color: rgb(255, 255, 255)
 line-height: normal
 list-style-image: none
 list-style-position: outside
 list-style-type: disc
 margin-bottom: 0px
 margin-left: 0px
 margin-right: 0px
@@ skipping 94 matching lines @@
 word-wrap: normal
 writing-mode: lr-tb
 x: 0px
 y: 0px
 z-index: auto
 zoom: 1
 PASS successfullyParsed is true
 
 TEST COMPLETE