This reverts commit 03923558.

Reason for revert: fails compilation on Android, ChromeOS and Fuchsia during roll https://chromium-review.googlesource.com/c/chromium/src/+/1392624

Original change's description:
> Load entry points dynamically in tests and samples.
> 
> This CL adds a dynamic loader generator based on XML files. It also
> refactors the entry point generation script to move the XML parsing
> into a helper class.
> 
> Additionally this includes a new GLES 1.0 base header. The new
> header allows for function pointer types and hiding prototypes.
> 
> All tests and samples now load ANGLE dynamically. In the future this
> will be extended to load entry points from the driver directly when
> possible. This will allow us to perform more accurate A/B testing.
> 
> The new build configuration leads to some tests having more warnings
> applied. The CL includes fixes for the new warnings.
> 
> Bug: angleproject:2995
> Change-Id: I6726d4163f7a6e54d2482f094c0a952f59702a05
> Reviewed-on: https://chromium-review.googlesource.com/c/1359516
> Commit-Queue: Jamie Madill <jmadill@chromium.org>
> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>

TBR=ynovikov@chromium.org,jmadill@chromium.org,syoussefi@chromium.org

Change-Id: I902bec2d733c2b879be29c02ab52a0b7d4eaa077
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:2995
Reviewed-on: https://chromium-review.googlesource.com/c/1392381Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>