Add WebView P bot, chromium side changes.

Bug: 997267
Change-Id: Icb17aa6d3eb77ba14ca890eb9cc2eecaaf822787
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1768907
Commit-Queue: Andrew Luo <aluo@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#693044}

infra/config/cr-buildbucket.cfg

@@ -1158,6 +1158,13 @@ buckets {
       mixins: "linux-xenial"
     }
 
+    builders {
+      name: "Android WebView P (dbg)"
+      mixins: "android-ci-goma-rbe-prod"
+      mixins: "builderless"
+      mixins: "linux-xenial"
+    }
+
     builders {
       name: "Android WebView O NetworkService (dbg)"
       mixins: "android-fyi-ci"

infra/config/luci-milo.cfg

@@ -1586,6 +1586,11 @@ consoles {
     category: "tester|webview"
     short_name: "O"
   }
+  builders {
+    name: "buildbucket/luci.chromium.ci/Android WebView P (dbg)"
+    category: "tester|webview"
+    short_name: "P"
+  }
   builders {
     name: "buildbucket/luci.chromium.ci/android-kitkat-arm-rel"
     category: "on_cq"

infra/config/luci-scheduler.cfg

@@ -663,6 +663,17 @@ job {
   }
 }
 
+job {
+  id: "Android WebView P (dbg)"
+  # triggered by "Android arm64 Builder (dbg)"
+  acl_sets: "triggered-by-parent-builders"
+  buildbucket: {
+    server: "cr-buildbucket.appspot.com"
+    bucket: "luci.chromium.ci"
+    builder: "Android WebView P (dbg)"
+  }
+}
+
 job {
   id: "Android WebView O NetworkService (dbg)"
   # triggered by "Android arm64 Builder (dbg)"

testing/buildbot/mixins.pyl

@@ -546,6 +546,14 @@
       },
     },
   },
+  'pie_fleet': {
+    'swarming': {
+      'dimensions': {
+        'device_os': 'PQ3A.190801.002',
+        'device_os_flavor': 'google',
+      },
+    },
+  },
   'shamu': {
     # Nexus 6
     'swarming': {

testing/buildbot/waterfalls.pyl

@@ -259,6 +259,17 @@
         'use_swarming': True,
         'os_type': 'android',
       },
+      'Android WebView P (dbg)': {
+        'mixins': [
+          'pie_fleet',
+          'walleye',
+        ],
+        'test_suites': {
+          'gtest_tests': 'webview_bot_all_gtests',
+        },
+        'use_swarming': True,
+        'os_type': 'android',
+      },
       'Android arm Builder (dbg)': {
         'additional_compile_targets': [
           'dump_syms',