Revert of Remove typedefs.h from webrtc/ root (part 1)

Revert of Remove typedefs.h from webrtc/ root (part 1) (patchset #3 id:40001 of https://codereview.webrtc.org/3007253002/ )

Reason for revert:
Breaks the Chromium WebRTC FYI bots:
https://build.chromium.org/p/chromium.webrtc.fyi/builders/ios-simulator/builds/2834
https://build.chromium.org/p/chromium.webrtc.fyi/builders/Win%20Builder/builds/11775

Example:
FAILED: obj/third_party/libjingle_xmpp/libjingle_xmpp_unittests/xmpplogintask_unittest.obj 
ninja -t msvc -e environment.x86 -- E:\b\c\goma_client/gomacc.exe "e:\b\c\win_toolchain\vs_files\f53e4598951162bad6330f7a167486c7ae5db1e5\vc\bin\amd64_x86/cl.exe" /nologo /showIncludes  @obj/third_party/libjingle_xmpp/libjingle_xmpp_unittests/xmpplogintask_unittest.obj.rsp /c ../../third_party/libjingle_xmpp/xmpp/xmpplogintask_unittest.cc /Foobj/third_party/libjingle_xmpp/libjingle_xmpp_unittests/xmpplogintask_unittest.obj /Fd"obj/third_party/libjingle_xmpp/libjingle_xmpp_unittests_cc.pdb"
../../third_party/libjingle_xmpp/xmpp/xmpplogintask_unittest.cc(95): error C3861: 'FALLTHROUGH': identifier not found



Original issue's description:
> Remove typedefs.h from webrtc/ root (part 1)
> 
> Split out webrtc-specific #defines from typedefs.h, into rtc_base/annotations.h and rtc_base/arch.h.
> Also removes the curiously named WEBRTC_CPU_DETECTION #define.
> 
> BUG=webrtc:6854
> 
> Review-Url: https://codereview.webrtc.org/3007253002
> Cr-Commit-Position: refs/heads/master@{#19752}
> Committed: https://chromium.googlesource.com/external/webrtc/+/a895836321e68b67ca2081c3bdbf6c08d8ee4b57

TBR=kwiberg@webrtc.org,solenberg@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6854
Review-Url: https://codereview.webrtc.org/3013543002
Cr-Commit-Position: refs/heads/master@{#19754}
Committed: https://chromium.googlesource.com/external/webrtc/+/bdf3072f1a06c7af95420e314cac4de72b7f8248

[kjellander_webrtc, 2017-09-08 18:00:12]

The CQ bit was checked by kjellander@webrtc.org

[kjellander_webrtc, 2017-09-08 18:00:13]

Created Revert of Remove typedefs.h from webrtc/ root (part 1)

[commit-bot: I haz the power, 2017-09-08 18:00:16]

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, 2017-09-08 18:00:22]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1504893612968520, "parent_rev":
"ec2c93e9479c3c6b8abffa2252a15475ab75f6dd", "commit_rev":
"bdf3072f1a06c7af95420e314cac4de72b7f8248"}

[commit-bot: I haz the power, 2017-09-08 18:00:27]

Description was changed from

==========
Revert of Remove typedefs.h from webrtc/ root (part 1) (patchset #3 id:40001 of
https://codereview.webrtc.org/3007253002/ )

Reason for revert:
Breaks the Chromium WebRTC FYI bots:
https://build.chromium.org/p/chromium.webrtc.fyi/builders/ios-simulator/build...
https://build.chromium.org/p/chromium.webrtc.fyi/builders/Win%20Builder/build...

Example:
FAILED:
obj/third_party/libjingle_xmpp/libjingle_xmpp_unittests/xmpplogintask_unittest.obj

ninja -t msvc -e environment.x86 -- E:\b\c\goma_client/gomacc.exe
"e:\b\c\win_toolchain\vs_files\f53e4598951162bad6330f7a167486c7ae5db1e5\vc\bin\amd64_x86/cl.exe"
/nologo /showIncludes 
@obj/third_party/libjingle_xmpp/libjingle_xmpp_unittests/xmpplogintask_unittest.obj.rsp
/c ../../third_party/libjingle_xmpp/xmpp/xmpplogintask_unittest.cc
/Foobj/third_party/libjingle_xmpp/libjingle_xmpp_unittests/xmpplogintask_unittest.obj
/Fd"obj/third_party/libjingle_xmpp/libjingle_xmpp_unittests_cc.pdb"
../../third_party/libjingle_xmpp/xmpp/xmpplogintask_unittest.cc(95): error
C3861: 'FALLTHROUGH': identifier not found



Original issue's description:
> Remove typedefs.h from webrtc/ root (part 1)
> 
> Split out webrtc-specific #defines from typedefs.h, into
rtc_base/annotations.h and rtc_base/arch.h.
> Also removes the curiously named WEBRTC_CPU_DETECTION #define.
> 
> BUG=webrtc:6854
> 
> Review-Url: https://codereview.webrtc.org/3007253002
> Cr-Commit-Position: refs/heads/master@{#19752}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/a895836321e68b67ca2081c3b...

TBR=kwiberg@webrtc.org,solenberg@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6854
==========

to

==========
Revert of Remove typedefs.h from webrtc/ root (part 1) (patchset #3 id:40001 of
https://codereview.webrtc.org/3007253002/ )

Reason for revert:
Breaks the Chromium WebRTC FYI bots:
https://build.chromium.org/p/chromium.webrtc.fyi/builders/ios-simulator/build...
https://build.chromium.org/p/chromium.webrtc.fyi/builders/Win%20Builder/build...

Example:
FAILED:
obj/third_party/libjingle_xmpp/libjingle_xmpp_unittests/xmpplogintask_unittest.obj

ninja -t msvc -e environment.x86 -- E:\b\c\goma_client/gomacc.exe
"e:\b\c\win_toolchain\vs_files\f53e4598951162bad6330f7a167486c7ae5db1e5\vc\bin\amd64_x86/cl.exe"
/nologo /showIncludes 
@obj/third_party/libjingle_xmpp/libjingle_xmpp_unittests/xmpplogintask_unittest.obj.rsp
/c ../../third_party/libjingle_xmpp/xmpp/xmpplogintask_unittest.cc
/Foobj/third_party/libjingle_xmpp/libjingle_xmpp_unittests/xmpplogintask_unittest.obj
/Fd"obj/third_party/libjingle_xmpp/libjingle_xmpp_unittests_cc.pdb"
../../third_party/libjingle_xmpp/xmpp/xmpplogintask_unittest.cc(95): error
C3861: 'FALLTHROUGH': identifier not found



Original issue's description:
> Remove typedefs.h from webrtc/ root (part 1)
> 
> Split out webrtc-specific #defines from typedefs.h, into
rtc_base/annotations.h and rtc_base/arch.h.
> Also removes the curiously named WEBRTC_CPU_DETECTION #define.
> 
> BUG=webrtc:6854
> 
> Review-Url: https://codereview.webrtc.org/3007253002
> Cr-Commit-Position: refs/heads/master@{#19752}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/a895836321e68b67ca2081c3b...

TBR=kwiberg@webrtc.org,solenberg@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6854

Review-Url: https://codereview.webrtc.org/3013543002
Cr-Commit-Position: refs/heads/master@{#19754}
Committed:
https://chromium.googlesource.com/external/webrtc/+/bdf3072f1a06c7af95420e314...
==========

[commit-bot: I haz the power, 2017-09-08 18:00:28]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/bdf3072f1a06c7af95420e314...