[test] Turn exemplary configurations into reference comments

This also updates the README with guidelines.

Bug: chromium:788104
Change-Id: I0ca0ea78c5990204b0242be9c7fe6368439a5dd1
Reviewed-on: https://chromium-review.googlesource.com/796311Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49713}

infra/testing/README.md

@@ -34,3 +34,17 @@ Example:
   ],
 }
 ```
+
+## Guidelines
+
+Please keep trybots and continuous bots in sync. E.g. add the same configuration
+for the release and debug CI bots and the corresponding trybot (where
+applicable). E.g.
+
+```
+tryserver.v8:
+  v8_linux64_rel_ng_triggered
+client.v8:
+  V8 Linux64
+  V8 Linux64 - debug
+```
\ No newline at end of file

infra/testing/client.v8.pyl

@@ -3,10 +3,11 @@
 # found in the LICENSE file.
 
 {
-  'V8 Linux64': [
-    {'name': 'benchmarks', 'variant': 'default', 'shards': 1},
-  ],
-  'V8 Linux64 - debug': [
-    {'name': 'benchmarks', 'variant': 'default', 'shards': 1},
-  ],
+  ### Example configuration for CI bots (please keep as reference).
+  # 'V8 Linux64': [
+  #   {'name': 'benchmarks', 'variant': 'default', 'shards': 1},
+  # ],
+  # 'V8 Linux64 - debug': [
+  #   {'name': 'benchmarks', 'variant': 'default', 'shards': 1},
+  # ],
 }
\ No newline at end of file

infra/testing/tryserver.v8.pyl

@@ -3,7 +3,8 @@
 # found in the LICENSE file.
 
 {
-  'v8_linux64_rel_ng_triggered': [
-    {'name': 'benchmarks', 'variant': 'default', 'shards': 1},
-  ],
+  ### Example configuration for trybots (please keep as reference).
+  # 'v8_linux64_rel_ng_triggered': [
+  #   {'name': 'benchmarks', 'variant': 'default', 'shards': 1},
+  # ],
 }
\ No newline at end of file