Run dev_server tests on both stable and canary channels

scripts/slave/recipes/catapult.py

Index: scripts/slave/recipes/catapult.py
diff --git a/scripts/slave/recipes/catapult.py b/scripts/slave/recipes/catapult.py
index b8e581b7aeb73c2fd8fa24fc3d8a38ede074ae98..bbd35a581fd2c692c201b69911488cec4145d7b1 100644
--- a/scripts/slave/recipes/catapult.py
+++ b/scripts/slave/recipes/catapult.py
@@ -59,18 +59,34 @@ def RunSteps(api):
   api.python('Tracing Python Tests',
              api.path['checkout'].join('tracing', 'bin', 'run_py_tests'),
              ['--no-install-hooks'])
-  api.python('Tracing Dev Server Tests',
+  api.python('Tracing Dev Server Tests: Chrome Stable',
              api.path['checkout'].join(
                  'tracing', 'bin', 'run_dev_server_tests'),
-             ['--no-install-hooks', '--no-use-local-chrome'])
+             ['--no-install-hooks',
+              '--no-use-local-chrome',
+              '--channel=stable'])
+  api.python('Tracing Dev Server Tests: Chrome Canary',
+             api.path['checkout'].join(
+                 'tracing', 'bin', 'run_dev_server_tests'),
+             ['--no-install-hooks',
+              '--no-use-local-chrome',
+              '--channel=canary'])
   api.python('Py-vulcanize Tests',
              api.path['checkout'].join(
                  'third_party', 'py_vulcanize', 'bin', 'run_py_tests'),
              ['--no-install-hooks'])
-  api.python('Perf Insights Dev Server Tests',
+  api.python('Perf Insights Dev Server Tests: Chrome Stable',
+             api.path['checkout'].join(
+                 'perf_insights', 'bin', 'run_dev_server_tests'),
+             ['--no-install-hooks',
+              '--no-use-local-chrome',
+              '--channel=stable'])
+  api.python('Perf Insights Dev Server Tests: Chrome Canary',
              api.path['checkout'].join(
                  'perf_insights', 'bin', 'run_dev_server_tests'),
-             ['--no-install-hooks', '--no-use-local-chrome'])
+             ['--no-install-hooks',
+              '--no-use-local-chrome',
+              '--channel=canary'])
   api.python('Systrace Tests',
              api.path['checkout'].join('systrace', 'bin', 'run_tests'))
   if not api.platform.is_win: