Excluding two troublesome trybots from the CQ config.

infra/config/cq.cfg

Index: infra/config/cq.cfg
diff --git a/infra/config/cq.cfg b/infra/config/cq.cfg
index 8547999a16e371b448fb28d244fbd244f077fbfb..821c4268a9844248dd9c94898e8adbcf9028d086 100644
--- a/infra/config/cq.cfg
+++ b/infra/config/cq.cfg
@@ -26,7 +26,8 @@ verifiers {
   try_job {
     buckets {
       name: "tryserver.webrtc"
-      builders { name: "android" }
+      # Temporary disabled due to reliability issues: crbug.com/526625.
+      #builders { name: "android" }
       builders { name: "android_arm64_rel" }
       builders { name: "android_clang" }
       builders { name: "android_gn" }
@@ -48,7 +49,8 @@ verifiers {
       builders { name: "linux_tsan2" }
       builders { name: "mac" }
       builders { name: "mac_asan" }
-      builders { name: "mac_baremetal" }
+      # Temporary disabled due to reliability issues: crbug.com/524352.
+      #builders { name: "mac_baremetal" }
       builders { name: "mac_rel" }
       builders { name: "mac_x64" }
       builders { name: "mac_x64_gn" }