Revert "Disable CQ experiments"

This reverts commit 7d7eb2c.

Reason for revert: outage is over

Original change's description:
> Disable CQ experiments
>
> We're having issues with high pending times on the linux CQ pool.
> Disabling this for now, since experiments are optional and are
> currently using up capacity.
>
> No-Presubmit: true
> Bug: 1133410
> Change-Id: I4d34c8a7403249601dfbbdba450b46b97d3ef869
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2438672
> Commit-Queue: Stephen Martinis <martiniss@chromium.org>
> Commit-Queue: Erik Staab <estaab@chromium.org>
> Auto-Submit: Stephen Martinis <martiniss@chromium.org>
> Reviewed-by: Erik Staab <estaab@chromium.org>
> Reviewed-by: Garrett Beaty <gbeaty@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#811773}

TBR=estaab@chromium.org,martiniss@chromium.org,gbeaty@chromium.org

Change-Id: Iba64cf556a302342d58dc207072ef8f05b868096
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1133410
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2441020
Reviewed-by: Stephen Martinis <martiniss@chromium.org>
Commit-Queue: Stephen Martinis <martiniss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812216}

infra/config/generated/commit-queue.cfg

@@ -239,7 +239,10 @@ config_groups {
       }
       builders {
         name: "chromium/try/android-marshmallow-x86-rel"
-        includable_only: true
+        experiment_percentage: 20
+        location_regexp: ".*"
+        location_regexp_exclude: ".+/[+]/docs/.+"
+        location_regexp_exclude: ".+/[+]/infra/config/.+"
       }
       builders {
         name: "chromium/try/android-marshmallow-x86-rel-non-cq"
@@ -282,7 +285,10 @@ config_groups {
       }
       builders {
         name: "chromium/try/android-pie-arm64-rel"
-        includable_only: true
+        experiment_percentage: 60
+        location_regexp: ".*"
+        location_regexp_exclude: ".+/[+]/docs/.+"
+        location_regexp_exclude: ".+/[+]/infra/config/.+"
       }
       builders {
         name: "chromium/try/android-pie-arm64-wpt-rel-non-cq"
@@ -572,7 +578,10 @@ config_groups {
       }
       builders {
         name: "chromium/try/fuchsia-compile-x64-dbg"
-        includable_only: true
+        experiment_percentage: 50
+        location_regexp: ".*"
+        location_regexp_exclude: ".+/[+]/docs/.+"
+        location_regexp_exclude: ".+/[+]/infra/config/.+"
       }
       builders {
         name: "chromium/try/fuchsia-fyi-arm64-dbg"
@@ -884,7 +893,10 @@ config_groups {
       }
       builders {
         name: "chromium/try/ios-simulator-code-coverage"
-        includable_only: true
+        experiment_percentage: 3
+        location_regexp: ".*"
+        location_regexp_exclude: ".+/[+]/docs/.+"
+        location_regexp_exclude: ".+/[+]/infra/config/.+"
       }
       builders {
         name: "chromium/try/ios-simulator-cr-recipe"
@@ -1051,7 +1063,14 @@ config_groups {
       }
       builders {
         name: "chromium/try/linux-perfetto-rel"
-        includable_only: true
+        experiment_percentage: 100
+        location_regexp: ".+/[+]/base/trace_event/.+"
+        location_regexp: ".+/[+]/base/tracing/.+"
+        location_regexp: ".+/[+]/components/tracing/.+"
+        location_regexp: ".+/[+]/content/browser/tracing/.+"
+        location_regexp: ".+/[+]/services/tracing/.+"
+        location_regexp_exclude: ".+/[+]/docs/.+"
+        location_regexp_exclude: ".+/[+]/infra/config/.+"
       }
       builders {
         name: "chromium/try/linux-rel"
@@ -1061,7 +1080,10 @@ config_groups {
       }
       builders {
         name: "chromium/try/linux-rel-builderful"
-        includable_only: true
+        experiment_percentage: 10
+        location_regexp: ".*"
+        location_regexp_exclude: ".+/[+]/docs/.+"
+        location_regexp_exclude: ".+/[+]/infra/config/.+"
       }
       builders {
         name: "chromium/try/linux-swangle-chromium-try-x64"
@@ -1265,7 +1287,10 @@ config_groups {
       }
       builders {
         name: "chromium/try/mac-coverage-rel"
-        includable_only: true
+        experiment_percentage: 8
+        location_regexp: ".*"
+        location_regexp_exclude: ".+/[+]/docs/.+"
+        location_regexp_exclude: ".+/[+]/infra/config/.+"
       }
       builders {
         name: "chromium/try/mac-dawn-rel"
@@ -1844,7 +1869,10 @@ config_groups {
       }
       builders {
         name: "chromium/try-m85/fuchsia_arm64"
-        includable_only: true
+        experiment_percentage: 50
+        location_regexp: ".*"
+        location_regexp_exclude: ".+/[+]/docs/.+"
+        location_regexp_exclude: ".+/[+]/infra/config/.+"
       }
       builders {
         name: "chromium/try-m85/fuchsia_x64"

infra/config/generated/cq-builders.md

@@ -347,9 +347,6 @@ These builders are run on some percentage of builds. Their results are ignored
 by CQ. These are often used to test new configurations before they are added
 as required builders.
 
-These builders are currently disabled due to the cq_disable_experiments outages
-setting. See //infra/config/outages/README.md for more information.
-
 * [android-marshmallow-x86-rel](https://ci.chromium.org/p/chromium/builders/try/android-marshmallow-x86-rel) ([definition](https://cs.chromium.org/search?q=package:%5Echromium$+file:/cq.star$+-file:/beta/+-file:/stable/+android-marshmallow-x86-rel)) ([matching builders](https://cs.chromium.org/search?q=+file:trybots.py+android-marshmallow-x86-rel))
   * Experiment percentage: 20
 

infra/config/outages/config.star

@@ -9,5 +9,4 @@ def _outages_config(*, disable_cq_experiments = False):
 
 # See README.md for documentation on allowable configuration values
 config = _outages_config(
-    disable_cq_experiments = True,
 )