Enable AltSvc pooling by default.

Enable AltSvc pooling by default.

* Change enable_alternative_service_with_different_host default value to true in
  production.
* Change enable_alternative_service_with_different_host default value to true in
  tests.
* Remove kEnableAlternativeServices command line switch.
* Change QUIC field trial parameter "enable_alternative_service_with_different_host"
  behavior from enabling if true to disabling if value is false.

BUG=392575
Review-Url: https://codereview.chromium.org/1986633002
Cr-Commit-Position: refs/heads/master@{#396508}
(cherry picked from commit 58f0aa68fb0a15b0af56e7cfdf833ac3108fa00e)

TBR=rch@chromium.org,bengr@chromium.org

Committed: https://chromium.googlesource.com/chromium/src/+/decead7175be5101f9dbef0fdc387d8a544d299b

[Bence, 2016-05-30 00:36:04]

Description was changed from

==========
Enable AltSvc pooling by default.

* Change enable_alternative_service_with_different_host default value to true in
  production.
* Change enable_alternative_service_with_different_host default value to true in
  tests.
* Remove kEnableAlternativeServices command line switch.
* Change QUIC field trial parameter
"enable_alternative_service_with_different_host"
  behavior from enabling if true to disabling if value is false.

BUG=392575

Review-Url: https://codereview.chromium.org/1986633002
Cr-Commit-Position: refs/heads/master@{#396508}
(cherry picked from commit 58f0aa68fb0a15b0af56e7cfdf833ac3108fa00e)

TBR=rch@chromium.org,bengr@chromium.org
==========

to

==========
Enable AltSvc pooling by default.

* Change enable_alternative_service_with_different_host default value to true in
  production.
* Change enable_alternative_service_with_different_host default value to true in
  tests.
* Remove kEnableAlternativeServices command line switch.
* Change QUIC field trial parameter
"enable_alternative_service_with_different_host"
  behavior from enabling if true to disabling if value is false.

BUG=392575

Review-Url: https://codereview.chromium.org/1986633002
Cr-Commit-Position: refs/heads/master@{#396508}
(cherry picked from commit 58f0aa68fb0a15b0af56e7cfdf833ac3108fa00e)

TBR=rch@chromium.org,bengr@chromium.org

Committed:
https://chromium.googlesource.com/chromium/src/+/decead7175be5101f9dbef0fdc38...
==========

[Bence, 2016-05-30 00:36:05]

Committed patchset #1 (id:1) manually as
decead7175be5101f9dbef0fdc387d8a544d299b (presubmit successful).

[Ryan Hamilton, 2016-05-30 00:45:14]

Thanks, Bence!