Revert "Move DirectManipulation to content/browser/renderer_host"

This reverts commit c03b7c57f81e79ae44742e7180300c2ea7c012aa.

Reason for revert: No need to move

Original change's description:
> Move DirectManipulation to content/browser/renderer_host
> 
> Because we want to move the CompositorAnimationObserver in to DirectManipulation,
> DirectManipulation need to store RenderWidgetHostViewAura for accessing compositor.
> This is the first step to move DirectManipulation to content/browser/renderer_host.
> 
> Bug: 914914
> Change-Id: I33340af7e8271deb7e9ee70fb31390fc22e65cdd
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1532676
> Commit-Queue: Jianpeng Chao <chaopeng@chromium.org>
> Reviewed-by: Scott Violet <sky@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#643221}

TBR=sky@chromium.org,chaopeng@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 914914
Change-Id: I9b11666685318cbf8f46368557810989f896d421
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1541992
Reviewed-by: Jianpeng Chao <chaopeng@chromium.org>
Commit-Queue: Jianpeng Chao <chaopeng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#644974}