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This reverts commit 07b983e8.

Reason for revert: It broken the chrome caroline-information pfq build and reef chrome pfq. See crbug.com/820302 for details.

Bug: 820302

Original change's description:
> Migrate ServicesCustomizationDocument to SimpleURLLoader
> 
> update to https://chromium-review.googlesource.com/c/chromium/src/+/884063
> 
> Bug: 773295
> Change-Id: Iba3ea07f19034bf9a1ea2c75876cac5d28297486
> Reviewed-on: https://chromium-review.googlesource.com/956291
> Reviewed-by: James Cook <jamescook@chromium.org>
> Reviewed-by: Matt Menke <mmenke@chromium.org>
> Commit-Queue: Mark Pilgrim <pilgrim@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#542180}

TBR=jamescook@chromium.org,mmenke@chromium.org,pilgrim@chromium.org

Change-Id: I529f57fc99d56d48068af69a4722f28425e76d77
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 773295
Reviewed-on: https://chromium-review.googlesource.com/957744Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Commit-Queue: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#542379}