Run no CPU benches in Debug trybots.

tools/nanobench_flags.py

Index: tools/nanobench_flags.py
diff --git a/tools/nanobench_flags.py b/tools/nanobench_flags.py
index 50d5feb930ee76f57fed05a25dcb67d0aa0279ab..451cd5583bd87b4e745ded6675c2834f49eea427 100755
--- a/tools/nanobench_flags.py
+++ b/tools/nanobench_flags.py
@@ -120,6 +120,10 @@ def get_args(bot):
   match.append('~inc0.webp')
   match.append('~inc1.webp')
 
+  # As an experiment, skip nanobench on Debug trybots.
+  if 'Debug' in bot and 'CPU' in bot and 'Trybot' in bot:
+    match = ['nothing_will_match_this']
+
   if match:
     args.append('--match')
     args.extend(match)
@@ -139,6 +143,7 @@ def self_test():
     'Test-Win7-MSVC-ShuttleA-GPU-HD2000-x86-Debug-ANGLE',
     'Test-iOS-Clang-iPad4-GPU-SGX554-Arm7-Debug',
     'Test-Android-GCC-GalaxyS4-GPU-SGX544-Arm7-Release',
+    'Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-Trybot',
   ]
 
   cov = coverage.coverage()