Add testing/buildbot/tryserver.blink for the GN bots.

testing/buildbot/tryserver.blink

Index: testing/buildbot/tryserver.blink
diff --git a/testing/buildbot/tryserver.chromium.mac.json b/testing/buildbot/tryserver.blink
similarity index 56%
copy from testing/buildbot/tryserver.chromium.mac.json
copy to testing/buildbot/tryserver.blink
index 3e49ba271ffa72253050519a47493f584224ab62..a09070d10de513977b63f7eae3462473ba2db8f2 100644
--- a/testing/buildbot/tryserver.chromium.mac.json
+++ b/testing/buildbot/tryserver.blink
@@ -1,15 +1,11 @@
 {
-  "mac_chromium_gn_dbg": {
+  "android_chromium_gn_compile_rel": {
     "additional_compile_targets": [
-      "all"
+      "chrome_shell_apk"
     ],
-    "gtest_tests": [
-      {
-        "test": "base_unittests"
-      }
-    ]
+    "gtest_tests": []
   },
-  "mac_chromium_gn_rel": {
+  "linux_chromium_gn_rel": {
     "additional_compile_targets": [
       "all"
     ],