Revert "Android: Factor InProductHelp UI out of Tab"

This reverts commit 41ee7d38d589f07b27671455fff28041ca32aee7.

Reason for revert: Cause of https://crbug.com/907602

Original change's description:
> Android: Factor InProductHelp UI out of Tab
> 
> This CL moves the methods handling InProductHelp UI in Tab to
> ToolbarButtonInProductHelpController using ActivityLifecycleDispatcher and
> Tab page load observing mechanism. Now the methods are handled by
> ChromeTabbedActivity only.
> 
> Bug: 889682
> Change-Id: Idce805f60f32ad90418c0f6e3ded80df6d18f9b1
> Reviewed-on: https://chromium-review.googlesource.com/c/1272779
> Commit-Queue: Jinsuk Kim <jinsukkim@chromium.org>
> Reviewed-by: Ted Choc <tedchoc@chromium.org>
> Reviewed-by: Theresa <twellington@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#609881}

TBR=tedchoc@chromium.org,twellington@chromium.org,mdjones@chromium.org,jinsukkim@chromium.org,robertogden@chromium.org

Change-Id: I539d82b07ee8f6a3012ad72e1f2ba35eda613d72
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 889682
Reviewed-on: https://chromium-review.googlesource.com/c/1347199
Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610258}
3 files changed