Reduce dependencies on rtc::FileSystem in FileRotatingStream tests

Revert of Reduce dependencies on rtc::FileSystem in FileRotatingStream tests, adding helpers in webrtc::test:: (patchset #7 id:120001 of https://codereview.webrtc.org/2872283002/ )

Reason for revert:
Fails to compile successfully. 

Original issue's description:
> Reduce dependencies on rtc::FileSystem in FileRotatingStream tests.
> 
> Use webrtc::test::OutputPath instead of Filesystem::GetAppTempFolder.
> Added functions RemoveFile and RemoveDir in the webrtc::test namespace,
> to replace use of Filesystem::DeleteFolderAndContents.
> 
> This makes Filesystem::DeleteFolderAndContents unused, to be deleted
> together with related code in a followup cl.
> 
> BUG=webrtc:7345
> 
> Review-Url: https://codereview.webrtc.org/2872283002
> Cr-Commit-Position: refs/heads/master@{#18173}
> Committed: https://chromium.googlesource.com/external/webrtc/+/dd7b5f32b59d9def668b9e9487589a572f20f6e0

TBR=pthatcher@webrtc.org,kjellander@webrtc.org,tommi@webrtc.org,nisse@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7345

[charujain1, 2017-05-17 11:52:05]

The CQ bit was checked by charujain@google.com

[charujain1, 2017-05-17 11:52:05]

Created Revert of Reduce dependencies on rtc::FileSystem in FileRotatingStream
tests, adding helpers in webrtc::test::

[commit-bot: I haz the power, 2017-05-17 11:52:14]

The CQ bit was unchecked by commit-bot@chromium.org

[charujain1, 2017-05-17 11:54:01]

The CQ bit was checked by charujain@google.com

[commit-bot: I haz the power, 2017-05-17 11:54:04]

The CQ bit was unchecked by commit-bot@chromium.org

[charujain1, 2017-05-17 11:54:48]

The CQ bit was checked by charujain@google.com

[commit-bot: I haz the power, 2017-05-17 11:54:54]

The CQ bit was unchecked by commit-bot@chromium.org

[charujain1, 2017-05-17 11:55:23]

The CQ bit was checked by charujain@google.com

[commit-bot: I haz the power, 2017-05-17 11:55:34]

The CQ bit was unchecked by commit-bot@chromium.org

[mbonadei, 2017-05-17 11:56:26]

The CQ bit was checked by mbonadei@webrtc.org

[commit-bot: I haz the power, 2017-05-17 11:56:35]

The CQ bit was unchecked by commit-bot@chromium.org

[charujain1, 2017-05-17 11:56:51]

The CQ bit was checked by charujain@google.com

[commit-bot: I haz the power, 2017-05-17 11:56:55]

The CQ bit was unchecked by commit-bot@chromium.org

[charujain1, 2017-05-17 12:00:22]

The CQ bit was checked by charujain@google.com

[commit-bot: I haz the power, 2017-05-17 12:00:25]

The CQ bit was unchecked by commit-bot@chromium.org

[charujain1, 2017-05-17 12:19:45]

The CQ bit was checked by charujain@google.com

[commit-bot: I haz the power, 2017-05-17 12:19:52]

The CQ bit was unchecked by commit-bot@chromium.org

[ehmaldonado_webrtc, 2017-05-17 12:20:52]

The CQ bit was checked by ehmaldonado@webrtc.org

[commit-bot: I haz the power, 2017-05-17 12:21:07]

The CQ bit was unchecked by commit-bot@chromium.org

[tandrii_google, 2017-05-17 12:25:39]

The CQ bit was checked by tandrii@google.com

[commit-bot: I haz the power, 2017-05-17 12:25:43]

The CQ bit was unchecked by commit-bot@chromium.org

[ehmaldonado_webrtc, 2017-05-17 12:30:11]

On 2017/05/17 11:52:05, charujain1 wrote:
> Created Revert of Reduce dependencies on rtc::FileSystem in FileRotatingStream
> tests, adding helpers in webrtc::test::

lgtm

[ehmaldonado_webrtc, 2017-05-17 12:30:17]

The CQ bit was checked by ehmaldonado@webrtc.org

[ehmaldonado_webrtc, 2017-05-17 12:30:17]

The CQ bit was unchecked by ehmaldonado@webrtc.org

[ehmaldonado_webrtc, 2017-05-17 12:30:19]

The CQ bit was checked by ehmaldonado@webrtc.org

[commit-bot: I haz the power, 2017-05-17 12:30:22]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[kjellander_webrtc, 2017-05-17 12:30:24]

lgtm

[commit-bot: I haz the power, 2017-05-17 12:30:25]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-05-17 12:30:26]

Failed to apply the patch.
On branch working_branch
Your branch is up-to-date with 'origin/refs/heads/master'.
nothing to commit, working tree clean

[ehmaldonado_webrtc, 2017-05-17 12:30:53]

The CQ bit was unchecked by ehmaldonado@webrtc.org

[ehmaldonado_webrtc, 2017-05-17 12:31:34]

Description was changed from

==========
Revert of Reduce dependencies on rtc::FileSystem in FileRotatingStream tests,
adding helpers in webrtc::test:: (patchset #7 id:120001 of
https://codereview.webrtc.org/2872283002/ )

Reason for revert:
Fails to compile successfully. 

Original issue's description:
> Reduce dependencies on rtc::FileSystem in FileRotatingStream tests.
> 
> Use webrtc::test::OutputPath instead of Filesystem::GetAppTempFolder.
> Added functions RemoveFile and RemoveDir in the webrtc::test namespace,
> to replace use of Filesystem::DeleteFolderAndContents.
> 
> This makes Filesystem::DeleteFolderAndContents unused, to be deleted
> together with related code in a followup cl.
> 
> BUG=webrtc:7345
> 
> Review-Url: https://codereview.webrtc.org/2872283002
> Cr-Commit-Position: refs/heads/master@{#18173}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/dd7b5f32b59d9def668b9e948...

TBR=pthatcher@webrtc.org,kjellander@webrtc.org,tommi@webrtc.org,nisse@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7345
==========

to

==========
Revert of Reduce dependencies on rtc::FileSystem in FileRotatingStream tests,
adding helpers in webrtc::test:: (patchset #7 id:120001 of
https://codereview.webrtc.org/2872283002/ )

Reason for revert:
Fails to compile successfully. 

Original issue's description:
> Reduce dependencies on rtc::FileSystem in FileRotatingStream tests.
> 
> Use webrtc::test::OutputPath instead of Filesystem::GetAppTempFolder.
> Added functions RemoveFile and RemoveDir in the webrtc::test namespace,
> to replace use of Filesystem::DeleteFolderAndContents.
> 
> This makes Filesystem::DeleteFolderAndContents unused, to be deleted
> together with related code in a followup cl.
> 
> BUG=webrtc:7345
> 
> Review-Url: https://codereview.webrtc.org/2872283002
> Cr-Commit-Position: refs/heads/master@{#18173}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/dd7b5f32b59d9def668b9e948...

TBR=pthatcher@webrtc.org,kjellander@webrtc.org,tommi@webrtc.org,nisse@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7345
==========