Run chrome_app_unittests on win bots.

testing/buildbot/chromium.mac.json

Index: testing/buildbot/chromium.mac.json
diff --git a/testing/buildbot/chromium.mac.json b/testing/buildbot/chromium.mac.json
index feec4a88443bb105d73bd5e8f4ba19410e2a3770..58731e9bb43bc912df10bdd728322b10d53fd892 100644
--- a/testing/buildbot/chromium.mac.json
+++ b/testing/buildbot/chromium.mac.json
@@ -17,6 +17,7 @@
       "cacheinvalidation_unittests",
       "cast_unittests",
       "cc_unittests",
+      "chrome_app_unittests",
       "chromedriver_unittests",
       "crypto_unittests",
       "gcm_unit_tests",
@@ -102,6 +103,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "chrome_app_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "chromedriver_unittests"
       },
       {
@@ -415,6 +422,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "chrome_app_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "chromedriver_unittests"
       },
       {
@@ -728,6 +741,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "chrome_app_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "chromedriver_unittests"
       },
       {
@@ -1041,6 +1060,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "chrome_app_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "chromedriver_unittests"
       },
       {
@@ -1360,6 +1385,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "chrome_app_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "chromedriver_unittests"
       },
       {
@@ -1673,6 +1704,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "chrome_app_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "chromedriver_unittests"
       },
       {