Remove usage of USE_SYSTEM_PROTOBUF

Remove usage of USE_SYSTEM_PROTOBUF

It's no longer possible to build using the system libprotobuf, so the
macro USE_SYSTEM_PROTOBUF is not set anywhere.  This CL removes all
usages of it.

R=jam@chromium.org

Review-Url: https://codereview.chromium.org/2748203002
Cr-Commit-Position: refs/heads/master@{#462363}
Committed: https://chromium.googlesource.com/chromium/src/+/4b7c48089ce5ee9d1a2e4530a82f6bd31e398bbd

[Tom (Use chromium acct), 2017-03-14 19:09:58]

The CQ bit was checked by thomasanderson@google.com to run a CQ dry run

[Tom (Use chromium acct), 2017-03-14 19:10:04]

jam@ ptal

[commit-bot: I haz the power, 2017-03-14 19:11:03]

Dry run: 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, 2017-03-14 19:58:39]

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

[commit-bot: I haz the power, 2017-03-14 19:58:40]

Dry run: Try jobs failed on following builders:
  linux_chromium_chromeos_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Tom (Use chromium acct), 2017-03-27 17:53:37]

pinging jam@

[jam, 2017-03-28 23:56:20]

lgtm

[Tom (Use chromium acct), 2017-03-28 23:58:15]

The CQ bit was checked by thomasanderson@google.com

[commit-bot: I haz the power, 2017-03-28 23:59:00]

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, 2017-03-29 01:25:59]

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

[commit-bot: I haz the power, 2017-03-29 01:26:01]

Try jobs failed on following builders:
  linux_android_rel_ng on master.tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/linux_androi...)

[Tom (Use chromium acct), 2017-03-31 18:03:57]

The CQ bit was checked by thomasanderson@google.com

[commit-bot: I haz the power, 2017-03-31 18:04:40]

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, 2017-03-31 18:07:01]

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

[commit-bot: I haz the power, 2017-03-31 18:07:02]

Try jobs failed on following builders:
  ios-device on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-device/builds...)
  ios-device-xcode-clang on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-device-xcode-...)
  ios-simulator-xcode-clang on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator-xco...)

[Tom Anderson, 2017-03-31 18:16:14]

Patchset #2 (id:20001) has been deleted

[Tom Anderson, 2017-03-31 18:16:22]

The CQ bit was checked by thomasanderson@chromium.org

[Tom Anderson, 2017-03-31 18:16:23]

The patchset sent to the CQ was uploaded after l-g-t-m from jam@chromium.org
Link to the patchset: https://codereview.chromium.org/2748203002/#ps40001
(title: "Rebase")

[commit-bot: I haz the power, 2017-03-31 18:17:09]

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, 2017-03-31 18:39:45]

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

[commit-bot: I haz the power, 2017-03-31 18:39:47]

Try jobs failed on following builders:
  ios-simulator on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator/bui...)

[Tom (Use chromium acct), 2017-04-06 04:20:09]

The CQ bit was checked by thomasanderson@google.com

[commit-bot: I haz the power, 2017-04-06 04:20:29]

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, 2017-04-06 05:28:47]

CQ is committing da patch.

Bot data: {"patchset_id": 40001, "attempt_start_ts": 1491452409538500,
"parent_rev": "13a036338d78a0ff95e285300e39dceb06a04e39", "commit_rev":
"4b7c48089ce5ee9d1a2e4530a82f6bd31e398bbd"}

[commit-bot: I haz the power, 2017-04-06 05:30:27]

Description was changed from

==========
Remove usage of USE_SYSTEM_PROTOBUF

It's no longer possible to build using the system libprotobuf, so the
macro USE_SYSTEM_PROTOBUF is not set anywhere.  This CL removes all
usages of it.

R=jam@chromium.org
==========

to

==========
Remove usage of USE_SYSTEM_PROTOBUF

It's no longer possible to build using the system libprotobuf, so the
macro USE_SYSTEM_PROTOBUF is not set anywhere.  This CL removes all
usages of it.

R=jam@chromium.org

Review-Url: https://codereview.chromium.org/2748203002
Cr-Commit-Position: refs/heads/master@{#462363}
Committed:
https://chromium.googlesource.com/chromium/src/+/4b7c48089ce5ee9d1a2e4530a82f...
==========

[commit-bot: I haz the power, 2017-04-06 05:30:28]

Committed patchset #2 (id:40001) as
https://chromium.googlesource.com/chromium/src/+/4b7c48089ce5ee9d1a2e4530a82f...