Revert of Decoupling rtc_base from Obj-C code

Revert of Decoupling rtc_base from Obj-C code (patchset #1 id:1 of https://codereview.webrtc.org/3004373002/ )

Reason for revert:
It breaks a chromium FYI trybot (the switch from rtc_static_library to rtc_source_set seems to be the problem).

Original issue's description:
> Reland of Decoupling rtc_base from Obj-C code (patchset #1 id:1 of https://codereview.webrtc.org/3008103002/ )
> 
> Reason for revert:
> Trying to reland after fixing downstream project.
> 
> Original issue's description:
> > Revert of Decoupling rtc_base from Obj-C code (patchset #8 id:140001 of https://codereview.webrtc.org/3001623003/ )
> > 
> > Reason for revert:
> > It breaks a downstream project.
> > 
> > Original issue's description:
> > > Decoupling rtc_base from Obj-C code
> > > 
> > > The goal of this CL is to separate Obj-C/Obj-C++ code from targets which have
> > > also C++ code (see https://bugs.chromium.org/p/webrtc/issues/detail?id=7743
> > > for more information).
> > > 
> > > To achieve this we have created 2 targets (rtc_base_objc and rtc_base_generic)
> > > and rtc_base will act as a proxy between these targets (this way we can avoid a
> > > circular dependency between rtc_base_generic and rtc_base_objc).
> > > 
> > > BUG=webrtc:7743
> > > 
> > > Review-Url: https://codereview.webrtc.org/3001623003
> > > Cr-Commit-Position: refs/heads/master@{#19661}
> > > Committed: https://chromium.googlesource.com/external/webrtc/+/a0a5b98937de0f0bf90e17011d2cbc8c632cb409
> > 
> > TBR=kjellander@webrtc.org,kwiberg@webrtc.org
> > # Skipping CQ checks because original CL landed less than 1 days ago.
> > NOPRESUBMIT=true
> > NOTREECHECKS=true
> > NOTRY=true
> > BUG=webrtc:7743
> > 
> > Review-Url: https://codereview.webrtc.org/3008103002
> > Cr-Commit-Position: refs/heads/master@{#19664}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/791a8f611da8cc6b0668ccc03bf7525e6ba72a46
> 
> TBR=kjellander@webrtc.org,kwiberg@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:7743
> 
> Review-Url: https://codereview.webrtc.org/3004373002
> Cr-Commit-Position: refs/heads/master@{#19681}
> Committed: https://chromium.googlesource.com/external/webrtc/+/a0c893f324da5c9f0773f8990a29cd24643864e4

TBR=kjellander@webrtc.org,kwiberg@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7743
Review-Url: https://codereview.webrtc.org/3007183002
Cr-Commit-Position: refs/heads/master@{#19688}
Committed: https://chromium.googlesource.com/external/webrtc/+/9c5e511806ef64c4cede52722c8a7ae7ae50ff56

[mbonadei, 2017-09-05 12:16:55]

The CQ bit was checked by mbonadei@webrtc.org

[mbonadei, 2017-09-05 12:16:56]

Created Revert of Decoupling rtc_base from Obj-C code

[commit-bot: I haz the power, 2017-09-05 12:16:59]

CQ is trying da patch.

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

[commit-bot: I haz the power, 2017-09-05 12:17:03]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1504613815833560, "parent_rev":
"9c296b3490a40491455061209fdf409ce5214b19", "commit_rev":
"9c5e511806ef64c4cede52722c8a7ae7ae50ff56"}

[commit-bot: I haz the power, 2017-09-05 12:17:06]

Description was changed from

==========
Revert of Decoupling rtc_base from Obj-C code (patchset #1 id:1 of
https://codereview.webrtc.org/3004373002/ )

Reason for revert:
It breaks a chromium FYI trybot (the switch from rtc_static_library to
rtc_source_set seems to be the problem).

Original issue's description:
> Reland of Decoupling rtc_base from Obj-C code (patchset #1 id:1 of
https://codereview.webrtc.org/3008103002/ )
> 
> Reason for revert:
> Trying to reland after fixing downstream project.
> 
> Original issue's description:
> > Revert of Decoupling rtc_base from Obj-C code (patchset #8 id:140001 of
https://codereview.webrtc.org/3001623003/ )
> > 
> > Reason for revert:
> > It breaks a downstream project.
> > 
> > Original issue's description:
> > > Decoupling rtc_base from Obj-C code
> > > 
> > > The goal of this CL is to separate Obj-C/Obj-C++ code from targets which
have
> > > also C++ code (see
https://bugs.chromium.org/p/webrtc/issues/detail?id=7743
> > > for more information).
> > > 
> > > To achieve this we have created 2 targets (rtc_base_objc and
rtc_base_generic)
> > > and rtc_base will act as a proxy between these targets (this way we can
avoid a
> > > circular dependency between rtc_base_generic and rtc_base_objc).
> > > 
> > > BUG=webrtc:7743
> > > 
> > > Review-Url: https://codereview.webrtc.org/3001623003
> > > Cr-Commit-Position: refs/heads/master@{#19661}
> > > Committed:
https://chromium.googlesource.com/external/webrtc/+/a0a5b98937de0f0bf90e17011...
> > 
> > TBR=kjellander@webrtc.org,kwiberg@webrtc.org
> > # Skipping CQ checks because original CL landed less than 1 days ago.
> > NOPRESUBMIT=true
> > NOTREECHECKS=true
> > NOTRY=true
> > BUG=webrtc:7743
> > 
> > Review-Url: https://codereview.webrtc.org/3008103002
> > Cr-Commit-Position: refs/heads/master@{#19664}
> > Committed:
https://chromium.googlesource.com/external/webrtc/+/791a8f611da8cc6b0668ccc03...
> 
> TBR=kjellander@webrtc.org,kwiberg@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:7743
> 
> Review-Url: https://codereview.webrtc.org/3004373002
> Cr-Commit-Position: refs/heads/master@{#19681}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/a0c893f324da5c9f0773f8990...

TBR=kjellander@webrtc.org,kwiberg@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7743
==========

to

==========
Revert of Decoupling rtc_base from Obj-C code (patchset #1 id:1 of
https://codereview.webrtc.org/3004373002/ )

Reason for revert:
It breaks a chromium FYI trybot (the switch from rtc_static_library to
rtc_source_set seems to be the problem).

Original issue's description:
> Reland of Decoupling rtc_base from Obj-C code (patchset #1 id:1 of
https://codereview.webrtc.org/3008103002/ )
> 
> Reason for revert:
> Trying to reland after fixing downstream project.
> 
> Original issue's description:
> > Revert of Decoupling rtc_base from Obj-C code (patchset #8 id:140001 of
https://codereview.webrtc.org/3001623003/ )
> > 
> > Reason for revert:
> > It breaks a downstream project.
> > 
> > Original issue's description:
> > > Decoupling rtc_base from Obj-C code
> > > 
> > > The goal of this CL is to separate Obj-C/Obj-C++ code from targets which
have
> > > also C++ code (see
https://bugs.chromium.org/p/webrtc/issues/detail?id=7743
> > > for more information).
> > > 
> > > To achieve this we have created 2 targets (rtc_base_objc and
rtc_base_generic)
> > > and rtc_base will act as a proxy between these targets (this way we can
avoid a
> > > circular dependency between rtc_base_generic and rtc_base_objc).
> > > 
> > > BUG=webrtc:7743
> > > 
> > > Review-Url: https://codereview.webrtc.org/3001623003
> > > Cr-Commit-Position: refs/heads/master@{#19661}
> > > Committed:
https://chromium.googlesource.com/external/webrtc/+/a0a5b98937de0f0bf90e17011...
> > 
> > TBR=kjellander@webrtc.org,kwiberg@webrtc.org
> > # Skipping CQ checks because original CL landed less than 1 days ago.
> > NOPRESUBMIT=true
> > NOTREECHECKS=true
> > NOTRY=true
> > BUG=webrtc:7743
> > 
> > Review-Url: https://codereview.webrtc.org/3008103002
> > Cr-Commit-Position: refs/heads/master@{#19664}
> > Committed:
https://chromium.googlesource.com/external/webrtc/+/791a8f611da8cc6b0668ccc03...
> 
> TBR=kjellander@webrtc.org,kwiberg@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:7743
> 
> Review-Url: https://codereview.webrtc.org/3004373002
> Cr-Commit-Position: refs/heads/master@{#19681}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/a0c893f324da5c9f0773f8990...

TBR=kjellander@webrtc.org,kwiberg@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7743

Review-Url: https://codereview.webrtc.org/3007183002
Cr-Commit-Position: refs/heads/master@{#19688}
Committed:
https://chromium.googlesource.com/external/webrtc/+/9c5e511806ef64c4cede52722...
==========

[commit-bot: I haz the power, 2017-09-05 12:17:08]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/9c5e511806ef64c4cede52722...

[mbonadei, 2017-09-05 12:22:59]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.webrtc.org/3005143002/ by mbonadei@webrtc.org.

The reason for reverting is: Trying to fix the link error on the chromium FYI
trybots..