Revert "dpwas: Fix PWA title bar color not respect high contrast"

This reverts commit 2d36ba15069114304be7cf49595710e9899819cf.

Reason for revert: Breaks AppBrowserControllerBrowserTest for
linux-chromeos-dbg.  crbug.com/1409397

>
> Before:
> https://drive.google.com/file/d/1TJPTwxWsOvYpuDxMl_ohSMH2GWolO7a6/view?usp=share_link
>
> After:
> https://drive.google.com/file/d/1VqwktNfY6FIGQgCAvteYr1GvXn0Yivxa/view?usp=sharing
>
> Bug: 1406121
> Change-Id: Ia2e2633278e2480c41c7c37a6bb1b34a4f77341d
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4154077
> Reviewed-by: Alison Maher <almaher@microsoft.com>
> Commit-Queue: Xiaochun Zhao <xiaochunzhao@microsoft.com>
> Reviewed-by: Alan Cutter <alancutter@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1095499}

Bug: 1406121, 1409397
Change-Id: I2a0815b9cd11e944eb75330403066b424564a686
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4187875
Owners-Override: Florian Jacky <fjacky@google.com>
Commit-Queue: Florian Jacky <fjacky@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Joel Hockey <joelhockey@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1095589}