Revert of cc: Remove tile rasterize on demand for GPU rasterization

Revert of cc: Remove tile rasterize on demand for GPU rasterization (patchset #2 id:20001 of https://codereview.chromium.org/842483003/)

Reason for revert:
Speculative revert for https://code.google.com/p/chromium/issues/detail?id=449288

Original issue's description:
> cc: Remove tile rasterize on demand for GPU rasterization
>
> This code was recently added and isn't needed because it signals to the tile
> that it should raster on demand (checkerboard), but this will happen anyway with
> the delgated renderer.
>
> I've also removed a test that was breaking due to the change.
>
> The test wasn't really testing what we thought, because we wouldn't end up
> rasterizing anything with GPU, even though force was on.
>
> Committed: https://crrev.com/01a4b8027c2e9e678cd6afd0a97bf83807d55f5a
> Cr-Commit-Position: refs/heads/master@{#311109}

TBR=vmpstr@chromium.org,danakj@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/6bf7f22dd46c31ffcf72e48397edf3ec08533ad5
Cr-Commit-Position: refs/heads/master@{#311764}

[hendrikw, 2015-01-15 23:22:12]

Created Revert of cc: Remove tile rasterize on demand for GPU rasterization

[commit-bot: I haz the power, 2015-01-15 23:23:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/832353004/1

[commit-bot: I haz the power, 2015-01-15 23:25:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-15 23:28:25]

Patchset 1 (id:??) landed as
https://crrev.com/6bf7f22dd46c31ffcf72e48397edf3ec08533ad5
Cr-Commit-Position: refs/heads/master@{#311764}

[hendrikw, 2015-01-15 23:33:33]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/855583002/ by hendrikw@chromium.org.

The reason for reverting is: this will conflict with vmpstr's change :(.