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This reverts commit 7ca339e3.

Reason for revert: Broke test targets in some builds.
https://build.chromium.org/p/chromium.android/builders/Android%20arm64%20Builder%20%28dbg%29/builds/39819

Original change's description:
> Modules: Introduce a generic DFM native library loading system
> 
> DFMs that include both Java and native code will probably use JNI. This
> change introduces a reusable mechanism to load the native library and
> register its JNI methods.
> 
> Key points:
> 
> - There are 3 build variants supported:
>   1. Production builds with lld-generated partitions.
>   2. Component build (with feature code in a component).
>   3. Fallback release build (feature code in the main library)
> 
> - For consistency, explicit JNI registration is done in both
>   ChromeModern and Monochrome.
> 
> - The Test Dummy module is moved over to use this new system. VR will
>   join the fun in a follow-on change.
> 
> - Currently, modules must supply an explicit JNI registration method.
>   Common code will locate this method and call it, at the appropriate
>   time, on behalf of the module.
> 
> Bug: 870055
> Change-Id: Id400ff00b4be65f71536a4acffdfcf93cc3bea58
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1822846
> Commit-Queue: Christopher Grant <cjgrant@chromium.org>
> Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
> Reviewed-by: Andrew Grieve <agrieve@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#700276}

TBR=cjgrant@chromium.org,agrieve@chromium.org,tiborg@chromium.org

Change-Id: Ia5f504c0da25c85805a8521991c6eed8eac15267
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 870055
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1827245Reviewed-by: Christopher Grant <cjgrant@chromium.org>
Commit-Queue: Christopher Grant <cjgrant@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700358}