Revert of Replace IPC messages in layout_test_render_frame_observer.

Revert of Replace IPC messages in layout_test_render_frame_observer. (patchset #17 id:330001 of https://codereview.chromium.org/2594913002/ )

Reason for revert:
This CL breaks linux_site_isolation trybot required by the CQ for some CLs - let's try to revert.  See https://crbug.com/687353 for more information.

Original issue's description:
> Replace IPC messages in layout_test_render_frame_observer.
> 
> Also remove some forward declarations that are becoming useless.
> 
> BUG=577685
> 
> Review-Url: https://codereview.chromium.org/2594913002
> Cr-Commit-Position: refs/heads/master@{#446952}
> Committed: https://chromium.googlesource.com/chromium/src/+/165c6d9ac3870f1c12553eff57ea52b1c67a1fa1

TBR=mkwst@chromium.org,jam@chromium.org,sammc@chromium.org,tibell@chromium.org,jiameng@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=577685
Review-Url: https://codereview.chromium.org/2670573002
Cr-Commit-Position: refs/heads/master@{#447594}
Committed: https://chromium.googlesource.com/chromium/src/+/7b4b3bfebbb99287415c516f8792b9e9c9bc3436

[Łukasz Anforowicz, 2017-02-01 18:26:28]

The CQ bit was checked by lukasza@chromium.org

[Łukasz Anforowicz, 2017-02-01 18:26:29]

Created Revert of Replace IPC messages in layout_test_render_frame_observer.

[commit-bot: I haz the power, 2017-02-01 18:26:56]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[tibell, 2017-02-01 18:31:57]

lgtm

[commit-bot: I haz the power, 2017-02-01 20:21:09]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1485973588973560, "parent_rev":
"2cd69789c0cc1bf7b35f6c5673ba1db6f2273cf0", "commit_rev":
"7b4b3bfebbb99287415c516f8792b9e9c9bc3436"}

[commit-bot: I haz the power, 2017-02-01 20:21:47]

Description was changed from

==========
Revert of Replace IPC messages in layout_test_render_frame_observer. (patchset
#17 id:330001 of https://codereview.chromium.org/2594913002/ )

Reason for revert:
This CL breaks linux_site_isolation trybot required by the CQ for some CLs -
let's try to revert.  See https://crbug.com/687353 for more information.

Original issue's description:
> Replace IPC messages in layout_test_render_frame_observer.
> 
> Also remove some forward declarations that are becoming useless.
> 
> BUG=577685
> 
> Review-Url: https://codereview.chromium.org/2594913002
> Cr-Commit-Position: refs/heads/master@{#446952}
> Committed:
https://chromium.googlesource.com/chromium/src/+/165c6d9ac3870f1c12553eff57ea...

TBR=mkwst@chromium.org,jam@chromium.org,sammc@chromium.org,tibell@chromium.or...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=577685
==========

to

==========
Revert of Replace IPC messages in layout_test_render_frame_observer. (patchset
#17 id:330001 of https://codereview.chromium.org/2594913002/ )

Reason for revert:
This CL breaks linux_site_isolation trybot required by the CQ for some CLs -
let's try to revert.  See https://crbug.com/687353 for more information.

Original issue's description:
> Replace IPC messages in layout_test_render_frame_observer.
> 
> Also remove some forward declarations that are becoming useless.
> 
> BUG=577685
> 
> Review-Url: https://codereview.chromium.org/2594913002
> Cr-Commit-Position: refs/heads/master@{#446952}
> Committed:
https://chromium.googlesource.com/chromium/src/+/165c6d9ac3870f1c12553eff57ea...

TBR=mkwst@chromium.org,jam@chromium.org,sammc@chromium.org,tibell@chromium.or...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=577685

Review-Url: https://codereview.chromium.org/2670573002
Cr-Commit-Position: refs/heads/master@{#447594}
Committed:
https://chromium.googlesource.com/chromium/src/+/7b4b3bfebbb99287415c516f8792...
==========

[commit-bot: I haz the power, 2017-02-01 20:21:49]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/7b4b3bfebbb99287415c516f8792...