Revert of clean up replace contents()->GetMainFrame() to main_test_rfh()

Revert of clean up replace contents()->GetMainFrame() to main_test_rfh() (patchset #6 id:100001 of https://codereview.chromium.org/2375583002/ )

Reason for revert:
This patch is incorrect. |contents| and |contents()| are different objects.

Original issue's description:
> clean up replace contents()->GetMainFrame() to main_test_rfh()
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation
>
> Committed: https://crrev.com/721f96a79d8dbb6ab8ab3d4ae45f2219da100412
> Cr-Commit-Position: refs/heads/master@{#421303}

TBR=jinho.bang@samsung.com,simonhong@chromium.org,corona10@gmail.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/19453cfc96f1ab5fd8161ecc5177df291e9740c9
Cr-Commit-Position: refs/heads/master@{#421361}

[ncarter (slow), 2016-09-27 22:23:45]

The CQ bit was checked by nick@chromium.org

[ncarter (slow), 2016-09-27 22:23:45]

Created Revert of clean up replace contents()->GetMainFrame() to main_test_rfh()

[commit-bot: I haz the power, 2016-09-27 22:24:02]

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

[commit-bot: I haz the power, 2016-09-27 22:24:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-27 22:27:37]

Description was changed from

==========
Revert of clean up replace contents()->GetMainFrame() to main_test_rfh()
(patchset #6 id:100001 of https://codereview.chromium.org/2375583002/ )

Reason for revert:
This patch is incorrect. |contents| and |contents()| are different objects.

Original issue's description:
> clean up replace contents()->GetMainFrame() to main_test_rfh()
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation
> 
> Committed: https://crrev.com/721f96a79d8dbb6ab8ab3d4ae45f2219da100412
> Cr-Commit-Position: refs/heads/master@{#421303}

TBR=jinho.bang@samsung.com,simonhong@chromium.org,corona10@gmail.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
==========

to

==========
Revert of clean up replace contents()->GetMainFrame() to main_test_rfh()
(patchset #6 id:100001 of https://codereview.chromium.org/2375583002/ )

Reason for revert:
This patch is incorrect. |contents| and |contents()| are different objects.

Original issue's description:
> clean up replace contents()->GetMainFrame() to main_test_rfh()
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation
>
> Committed: https://crrev.com/721f96a79d8dbb6ab8ab3d4ae45f2219da100412
> Cr-Commit-Position: refs/heads/master@{#421303}

TBR=jinho.bang@samsung.com,simonhong@chromium.org,corona10@gmail.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/19453cfc96f1ab5fd8161ecc5177df291e9740c9
Cr-Commit-Position: refs/heads/master@{#421361}
==========

[commit-bot: I haz the power, 2016-09-27 22:27:38]

Patchset 1 (id:??) landed as
https://crrev.com/19453cfc96f1ab5fd8161ecc5177df291e9740c9
Cr-Commit-Position: refs/heads/master@{#421361}