pthreadpool: Integrate with Jobs API

pthreadpool is used by XNNPACK which in turns supports TFLite and WebNN
to execute each neural network operator of a model by multiple threads
in parallel.

To avoid creating an unmanaged thread pool owned by pthreadpool
implementation, this CL implements a shim of `pthreadpool_parallelize()`
that maps the pthreadpool thread tasks to work items and uses Jobs API
(`base::PostJob`) to schedule these work items with Chromium's
`base::ThreadPool` workers.

According to the test result on a multi-core device, when scheduling 4
work items with `base::ThreadPool`, XNNPACK model inference performance
could get ~1.9X speedup for MobileNet V2 and ~2.8X speedup for ResNet50
V2 compared to single thread execution. And the test result also shows
using Jobs API shim could achieve 85% and 97% performance of using
pthreadpool own thread pool implementation for MobileNet V2 and ResNet50
V2 respectively.

This CL also enables pthreadpool_unittests with Jobs API integration on
Windows and Linux bots that aligns with the `build_tflite_with_xnnpack`
build flag.


Bug: 1228275,1273291
Change-Id: I1152d1e93885399b453c87be18a432e6c118054e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4467727
Reviewed-by: danakj <danakj@chromium.org>
Commit-Queue: ningxin hu <ningxin.hu@intel.com>
Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Reviewed-by: Robert Ogden <robertogden@chromium.org>
Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Reviewed-by: Austin Sullivan <asully@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1150206}

infra/config/generated/testing/gn_isolate_map.pyl

@@ -1440,6 +1440,10 @@
     "label": "//chrome/browser/metrics/perf:profile_provider_unittest",
     "type": "console_test_launcher",
   },
+  "pthreadpool_unittests": {
+    "label": "//third_party/pthreadpool:pthreadpool_unittests",
+    "type": "console_test_launcher",
+  },
   "push_apps_to_background_apk": {
     "label": "//tools/android/push_apps_to_background:push_apps_to_background_apk",
     "type": "additional_compile_target",

infra/config/targets/targets.star

@@ -1763,6 +1763,11 @@ targets.console_test_launcher(
     label = "//chrome/browser/metrics/perf:profile_provider_unittest",
 )
 
+targets.console_test_launcher(
+    name = "pthreadpool_unittests",
+    label = "//third_party/pthreadpool:pthreadpool_unittests",
+)
+
 targets.compile_target(
     name = "push_apps_to_background_apk",
     label = "//tools/android/push_apps_to_background:push_apps_to_background_apk",

testing/buildbot/chrome.json

@@ -3388,6 +3388,25 @@
         "test": "printing_unittests",
         "test_id_prefix": "ninja://printing:printing_unittests/"
       },
+      {
+        "ci_only": true,
+        "merge": {
+          "script": "//testing/merge_scripts/standard_gtest_merge.py"
+        },
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "os": "Ubuntu-22.04",
+              "pool": "chrome.tests",
+              "ssd": "0"
+            }
+          ],
+          "service_account": "chrome-tester@chops-service-accounts.iam.gserviceaccount.com"
+        },
+        "test": "pthreadpool_unittests",
+        "test_id_prefix": "ninja://third_party/pthreadpool:pthreadpool_unittests/"
+      },
       {
         "merge": {
           "script": "//testing/merge_scripts/standard_gtest_merge.py"

testing/buildbot/chromium.cft.json

@@ -1186,6 +1186,25 @@
         "test": "printing_unittests",
         "test_id_prefix": "ninja://printing:printing_unittests/"
       },
+      {
+        "ci_only": true,
+        "isolate_profile_data": true,
+        "merge": {
+          "script": "//testing/merge_scripts/standard_gtest_merge.py"
+        },
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "cpu": "arm64",
+              "os": "Ubuntu-18.04"
+            }
+          ],
+          "service_account": "chromium-tester@chops-service-accounts.iam.gserviceaccount.com"
+        },
+        "test": "pthreadpool_unittests",
+        "test_id_prefix": "ninja://third_party/pthreadpool:pthreadpool_unittests/"
+      },
       {
         "isolate_profile_data": true,
         "merge": {
@@ -3368,6 +3387,24 @@
         "test": "printing_unittests",
         "test_id_prefix": "ninja://printing:printing_unittests/"
       },
+      {
+        "ci_only": true,
+        "isolate_profile_data": true,
+        "merge": {
+          "script": "//testing/merge_scripts/standard_gtest_merge.py"
+        },
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "os": "Ubuntu-18.04"
+            }
+          ],
+          "service_account": "chromium-tester@chops-service-accounts.iam.gserviceaccount.com"
+        },
+        "test": "pthreadpool_unittests",
+        "test_id_prefix": "ninja://third_party/pthreadpool:pthreadpool_unittests/"
+      },
       {
         "isolate_profile_data": true,
         "merge": {
@@ -7456,6 +7493,25 @@
         "test": "printing_unittests",
         "test_id_prefix": "ninja://printing:printing_unittests/"
       },
+      {
+        "ci_only": true,
+        "isolate_profile_data": true,
+        "merge": {
+          "script": "//testing/merge_scripts/standard_gtest_merge.py"
+        },
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "cpu": "x86-64",
+              "os": "Windows-10-19045"
+            }
+          ],
+          "service_account": "chromium-tester@chops-service-accounts.iam.gserviceaccount.com"
+        },
+        "test": "pthreadpool_unittests",
+        "test_id_prefix": "ninja://third_party/pthreadpool:pthreadpool_unittests/"
+      },
       {
         "isolate_profile_data": true,
         "merge": {