This reverts commit 4b9b9b68.

Reason for revert: Regresses Octane.

Original change's description:
> Reland "[turbofan] Rewrite CompilationDependencies"
> 
> This is a reland of 52a10e50, after
> eliminating an invalid assumption about maps.
> 
> TBR=jarin@chromium.org
> TBR=mstarzinger@chromium.org
> 
> Original change's description:
> > [turbofan] Rewrite CompilationDependencies
> >
> > Instead of installing code dependencies during graph reduction,
> > install them after code generation.
> >
> > Bug: v8:7902, v8:7790
> > Change-Id: I8a3798254abb5b9ec7c295a1592aeb6b51f24c7a
> > Reviewed-on: https://chromium-review.googlesource.com/1119913
> > Commit-Queue: Georg Neis <neis@chromium.org>
> > Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> > Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#54170}
> 
> Bug: v8:7902, v8:7790
> Change-Id: I9cbaf98980379b9b17464af5952ec0c47e1cdc6f
> Reviewed-on: https://chromium-review.googlesource.com/1126999
> Reviewed-by: Georg Neis <neis@chromium.org>
> Commit-Queue: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#54254}

TBR=mstarzinger@chromium.org,jarin@chromium.org,neis@chromium.org

Change-Id: Iece193046c48ee96ab7952d2b3bd7ad05f39b190
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7902, v8:7790
Reviewed-on: https://chromium-review.googlesource.com/1127119Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54260}