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This reverts commit 85ae69b0.

Reason for revert: crbug.com/1126038

Compile error on Linux Chrome:
https://ci.chromium.org/p/chrome/builders/ci/linux-chrome/15196

Original change's description:
> Add new class ColorTrackingIconView to deduplicate subclasses.
>
> Upon investigating the associated bug, I noticed that there are a few
> subclasses of ImageView that exist solely to override OnThemeChanged.
> Since I also needed a subclass like this to fix the bug, I decided to
> make a utility class to eliminate this ad-hoc subclassing, in the style
> of ColorTrackingVectorImageButton (in image_button_factory.cc).
>
> Bug: 1125510
> Change-Id: I975a9b6a4676bb6b2a454172f211f406934d7869
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2397737
> Commit-Queue: Bret Sepulveda <bsep@chromium.org>
> Reviewed-by: Trent Apted <tapted@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#804901}

TBR=tapted@chromium.org,bsep@chromium.org

Change-Id: I958b5f7c04434b680f58fb0d0e0e46a8529a6abb
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1125510, 1126038
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2398778Reviewed-by: Owen Min <zmin@chromium.org>
Commit-Queue: Owen Min <zmin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804910}