Add manually-triggered trybot for 32-bit Android P Pixel 2 phones.

Bug: 855660
Change-Id: I26114b920ea9801a9d4bfdc74b29218dff035f41
Reviewed-on: https://chromium-review.googlesource.com/1112385Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569793}

infra/config/global/cr-buildbucket.cfg

@@ -481,10 +481,9 @@ builder_mixins {
   }
 }
 
-# GPU bots run very long tests sometimes on a single tester. The regular
-# timeout isn't enough on some testers during the migration when they run both
-# the buildbot and LUCI tests. Double the timeout for them.
-# TODO(cwallez@chromium.org): remove this when the migration is complete
+# GPU bots sometimes run very long tests on a small number of machines
+# or even a single tester. The regular timeout isn't enough on some of
+# these so double the standard timeout.
 builder_mixins {
   name: "gpu-slow-bot"
   execution_timeout_secs: 21600  # 2 x 3h for a double workload
@@ -599,6 +598,8 @@ buckets {
     builders {
       name: "Android FYI 32 dEQP Vk Release (Pixel 2)"
       mixins: "android-gpu-fyi-ci"
+      # Increase timeout to allow tryjobs against small number of phones.
+      mixins: "gpu-slow-bot"
     }
 
     builders {
@@ -609,6 +610,8 @@ buckets {
     builders {
       name: "Android FYI 32 Vk Release (Pixel 2)"
       mixins: "android-gpu-fyi-ci"
+      # Increase timeout to allow tryjobs against small number of phones.
+      mixins: "gpu-slow-bot"
     }
 
     builders {
@@ -619,6 +622,8 @@ buckets {
     builders {
       name: "Android FYI 64 dEQP Vk Release (Pixel 2)"
       mixins: "android-gpu-fyi-ci"
+      # Increase timeout to allow tryjobs against small number of phones.
+      mixins: "gpu-slow-bot"
     }
 
     builders {
@@ -629,6 +634,8 @@ buckets {
     builders {
       name: "Android FYI 64 Vk Release (Pixel 2)"
       mixins: "android-gpu-fyi-ci"
+      # Increase timeout to allow tryjobs against small number of phones.
+      mixins: "gpu-slow-bot"
     }
 
     builders {
@@ -1226,7 +1233,7 @@ buckets {
       name: "Mac FYI Experimental Retina Release (NVIDIA)"
       mixins: "mac-gpu-fyi-ci"
       # This bot has one machine backing its tests at the moment.
-      # If it gets more, this should be switched back to gpu-slow-fyi.
+      # If it gets more, this should be switched back to gpu-slow-bot.
       # See crbug.com/853307 for more context.
       execution_timeout_secs: 43200
     }
@@ -2392,6 +2399,12 @@ buckets {
       name: "android_unswarmed_pixel_aosp"
       dimensions: "os:Ubuntu-14.04"
     }
+    builders {
+      mixins: "android-optional-gpu-try"
+      # Increase timeout to allow tryjobs against small number of phones.
+      mixins: "gpu-slow-bot"
+      name: "gpu-manual-try-android-p-pixel-2-32"
+    }
 
     builders { mixins: "chromeos-try" name: "chromeos-amd64-generic-rel" }
     builders { mixins: "chromeos-try" name: "chromeos-daisy-rel" }

infra/config/global/luci-milo.cfg

@@ -4199,6 +4199,9 @@ consoles {
   builders {
     name: "buildbucket/luci.chromium.try/android-kitkat-arm-rel"
   }
+  builders {
+    name: "buildbucket/luci.chromium.try/gpu-manual-try-android-p-pixel-2-32"
+  }
   builder_view_only: true
 }
 
@@ -4819,6 +4822,9 @@ consoles {
   builders {
     name: "buildbucket/luci.chromium.try/fuchsia"
   }
+  builders {
+    name: "buildbucket/luci.chromium.try/gpu-manual-try-android-p-pixel-2-32"
+  }
   builders {
     name: "buildbucket/luci.chromium.try/gpu_manual_try_win7_nvidia_rel"
   }

tools/mb/mb_config.pyl

@@ -551,6 +551,7 @@
       'android_unswarmed_n5x_rel': 'android_release_trybot_arm64',
       'android_unswarmed_pixel_aosp': 'android_debug_trybot_arm64',
       'cast_shell_android': 'android_cast_debug_static_bot_compile_only',
+      'gpu-manual-try-android-p-pixel-2-32': 'gpu_tests_android_vulkan_release_trybot',
       'linux_android_dbg_ng': 'android_debug_trybot',
     },