[code coverage] Define test suite for linux and cq bot config.

We will need to customize the test targets that run on coverage bots, so
this change creates a dedicated suite. Also, this creates the config for
the new cq trybot.

R=jbudorick,stgao,liaoyuke

No-Try: true
Change-Id: I08563dd9b5375fa140356d36d536aa5d9e1c6418
Reviewed-on: https://chromium-review.googlesource.com/c/1324142
Commit-Queue: Roberto Carrillo <robertocn@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Yuke Liao <liaoyuke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606280}

testing/buildbot/test_suites.pyl

@@ -2549,6 +2549,19 @@
       'linux_flavor_specific_chromium_gtests',
     ],
 
+    'chromium_linux_coverage_gtests': [
+      'aura_gtests',
+      'chromium_gtests',
+      'chromium_gtests_for_devices_with_graphical_output',
+      'chromium_gtests_for_linux_and_chromeos_only',
+      'chromium_gtests_for_win_and_linux_only',
+      'linux_flavor_specific_chromium_gtests',
+      'network_service_gtests',
+      'non_android_chromium_gtests',
+      'non_android_and_cast_and_chromeos_chromium_gtests',
+      'vr_platform_specific_chromium_gtests',
+    ],
+
     'chromium_linux_dbg_isolated_scripts': [
       'desktop_chromium_isolated_scripts',
       'linux_specific_chromium_isolated_scripts',

testing/buildbot/waterfalls.pyl

@@ -1382,7 +1382,7 @@
             'code-coverage',
         ],
         'test_suites': {
-          'gtest_tests': 'chromium_linux_gtests',
+          'gtest_tests': 'chromium_linux_coverage_gtests',
         }
       },
       'linux-tcmalloc-rel': {
@@ -3488,6 +3488,19 @@
       },
     },
   },
+  {
+    'name': 'tryserver.chromium.linux',
+    'machines': {
+      'linux-coverage-rel': {
+        'mixins': [
+	  'code-coverage',
+        ],
+        'test_suites': {
+          'gtest_tests': 'chromium_linux_coverage_gtests',
+        },
+      },
+    },
+  },
   {
     'name': 'tryserver.webrtc',
     'machines': {