Fixed position with left:auto was broken because element's static position
was not propagated to old layout.

computeLogicalWidth(computedValues) eventually uses
layer()->getStaticInlinePosition
for positioning if left or top are not set.

We were not saving this value. I fixed it by saving the value inside the builder.
The reason for using builder is code reuse among different algorithms.

The fix makes 3 more tests pass.

Example:

<p>Yo</p>
<div id="div1" style="position:fixed:width:9px;height:9px;background-color:yellow" ></div>

BUG=635619
[ng_save_static]

Review-Url: https://codereview.chromium.org/2640153002
Cr-Commit-Position: refs/heads/master@{#444577}
4 files changed