base_perftests: Increase shard timeout

The base perftests can take longer than the default 120 seconds to
execute -- especially on low end Android devices. Increase the timeout
on Android to 10 minutes.

Bug: 906686
Change-Id: Iacfe08e3cbd1d6e7ef756a1a8c1028655a5d3918

TBR=fdoray@chromium.org

Change-Id: Iacfe08e3cbd1d6e7ef756a1a8c1028655a5d3918
Reviewed-on: https://chromium-review.googlesource.com/c/1353922Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Sami Kyöstilä <skyostil@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612228}

base/BUILD.gn

@@ -2077,6 +2077,7 @@ test("base_perftests") {
 
   if (is_android) {
     deps += [ "//testing/android/native_test:native_test_native_code" ]
+    shard_timeout = 600
   }
 }