Run app_shell_browsertests on Win waterfall and trybots.

testing/buildbot/chromium.win.json

Index: testing/buildbot/chromium.win.json
diff --git a/testing/buildbot/chromium.win.json b/testing/buildbot/chromium.win.json
index 26c913efa7ac8b3db4c929712bdd3a453aa6c789..60b1aaf5758df35bde002864c9e7ad67203f3d5f 100644
--- a/testing/buildbot/chromium.win.json
+++ b/testing/buildbot/chromium.win.json
@@ -8,6 +8,7 @@
           "can_use_on_swarming_builders": true
         }
       },
+      "app_shell_browsertests",
       "app_shell_unittests",
       {
         "test": "ash_unittests",
@@ -96,6 +97,7 @@
   "Vista Tests (1)": {
     "gtest_tests": [
       "accessibility_unittests",
+      "app_shell_browsertests",
       "app_shell_unittests",
       "ash_unittests",
       "aura_unittests",
@@ -207,6 +209,7 @@
           "can_use_on_swarming_builders": true
         }
       },
+      "app_shell_browsertests",
       "app_shell_unittests",
       "aura_unittests",
       {
@@ -317,6 +320,7 @@
         }
       },
       "app_list_unittests",
+      "app_shell_browsertests",
       "app_shell_unittests",
       "cacheinvalidation_unittests",
       "cast_unittests",
@@ -402,6 +406,7 @@
           "can_use_on_swarming_builders": true
         }
       },
+      "app_shell_browsertests",
       "app_shell_unittests",
       "aura_unittests",
       {