Remove ScrollInvalidationTracking
Remove ScrollInvalidationTracking

It was to track invalidation of non-composited viewport constrained
objects on scroll. However, it has been broken for nearly one year,
and the method to check whether to invalidate doesn't work for
CompositeAfterPaint. So I'm removing it.

Bug: 805134
Change-Id: I001c3df231aa16588b93e1207aad23379d64912d
Reviewed-on: https://chromium-review.googlesource.com/c/1435977
Reviewed-by: Andrey Kosyakov <03b08926e49d80331ab322c2b9e0332109fbfd39@chromium.org>
Commit-Queue: Xianzhu Wang <56bf68553a6eeecbbaf7c80da87195a59c9681bb@chromium.org>
Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#628982}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 20de77c4f822ae5f2b8f7b2f267d4a64d103c8bf
ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend