mac: Switch the default build configuration to use the 10.10 SDK.

mac: Switch the default build configuration to use the 10.10 SDK.

This change is intended to be temporary. The goal is to release a Canary
compiled against the 10.10 SDK, and then to revert this CL.

BUG=463170
Committed: https://crrev.com/42ba22e0b8e87f758804537f64db23ff6438e451
Cr-Commit-Position: refs/heads/master@{#340992}

[erikchen, 2015-07-20 18:28:28]

erikchen@chromium.org changed reviewers:
+ amineer@chromium.org, thakis@chromium.org

[erikchen, 2015-07-20 18:28:28]

thakis: Please review.

The current plan is to land this on Wednesday morning, so that the Thursday
Canary will be compiled against the 10.10 SDK. This CL will be reverted Thursday
morning.

[Nico, 2015-07-20 18:29:46]

Nice! Even though it's just temporary, you should make the same change in
build/config/mac/mac_sdk.gni in the same CL.

[erikchen, 2015-07-20 19:01:20]

On 2015/07/20 18:29:46, Nico wrote:
> Nice! Even though it's just temporary, you should make the same change in
> build/config/mac/mac_sdk.gni in the same CL.

Done.

[Nico, 2015-07-20 19:01:49]

lgtm

[Nico, 2015-07-20 19:07:04]

Also, you should probably send an announcement to chromium-dev saying something
like "mac: we'll require the 10.10 sdk soon (but we'll keep targeting 10.6). run
`if xcodebuild -version -sdk | grep -q 10.10; then echo "you're good"; else echo
"you need to get the 10.10 sdk"; fi` to see if you need to do anything" fairly
soon.

[erikchen, 2015-07-20 20:11:27]

On 2015/07/20 19:07:04, Nico wrote:
> Also, you should probably send an announcement to chromium-dev saying
something
> like "mac: we'll require the 10.10 sdk soon (but we'll keep targeting 10.6).
run
> `if xcodebuild -version -sdk | grep -q 10.10; then echo "you're good"; else
echo
> "you need to get the 10.10 sdk"; fi` to see if you need to do anything" fairly
> soon.

Done.

[erikchen, 2015-07-29 20:22:28]

The CQ bit was checked by erikchen@chromium.org

[commit-bot: I haz the power, 2015-07-29 20:24:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1246743003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1246743003/20001

[commit-bot: I haz the power, 2015-07-29 21:37:32]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-07-29 21:38:44]

Patchset 2 (id:??) landed as
https://crrev.com/42ba22e0b8e87f758804537f64db23ff6438e451
Cr-Commit-Position: refs/heads/master@{#340992}

[erikchen, 2015-07-29 22:39:50]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/1254123003/ by erikchen@chromium.org.

The reason for reverting is: Causes gclient runhooks to fail on bots that don't
have the 10.10 SDK (even though they don't need to compile).