[devtools-frontend] define {DevTools Linux} bot in src-side

This CL specifies layout tests to run with the bot.

R=yangguo@chromium.org
TBR=machenbach@chromium.org,jbudorick@chromium.org,bmeurer@chromium.org

Bug: chromium:995657
No-Try: True
Change-Id: I7dbd30705728a0555703422fe7f1d6edabb6ce3a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1760960
Commit-Queue: Tamer Tas <tmrts@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Auto-Submit: Tamer Tas <tmrts@chromium.org>
Cr-Commit-Position: refs/heads/master@{#688431}

testing/buildbot/client.devtools-frontend.integration.json

+{
+  "AAAAA1 AUTOGENERATED FILE DO NOT EDIT": {},
+  "AAAAA2 See generate_buildbot_json.py to make changes": {},
+  "DevTools Linux": {
+    "gtest_tests": [
+      {
+        "args": [
+          "--disable-blink-features=LayoutNG"
+        ],
+        "merge": {
+          "args": [],
+          "script": "//testing/merge_scripts/standard_gtest_merge.py"
+        },
+        "name": "webkit_unit_tests_ng",
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "os": "Ubuntu-16.04"
+            }
+          ]
+        },
+        "test": "blink_unittests"
+      }
+    ],
+    "isolated_scripts": [
+      {
+        "args": [
+          "--num-retries=3"
+        ],
+        "isolate_name": "blink_web_tests_exparchive",
+        "merge": {
+          "args": [
+            "--verbose"
+          ],
+          "script": "//third_party/blink/tools/merge_web_test_results.py"
+        },
+        "name": "webkit_layout_tests",
+        "results_handler": "layout tests",
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "os": "Ubuntu-16.04"
+            }
+          ],
+          "shards": 12
+        }
+      }
+    ]
+  }
+}

testing/buildbot/generate_buildbot_json.py

@@ -1068,6 +1068,8 @@ class BBJSONGenerator(object):
             # These waterfalls have their bot configs in a different repo.
             # so we don't know about their bot names.
             continue  # pragma: no cover
+          if waterfall['name'] in ['client.devtools-frontend.integration']:
+            continue  # pragma: no cover
           raise self.unknown_bot(bot_name, waterfall['name'])
 
     # All test suites must be referenced.

testing/buildbot/waterfalls.pyl

@@ -4095,6 +4095,20 @@
       },
     },
   },
+  {
+    'name': 'client.devtools-frontend.integration',
+    'machines': {
+      'DevTools Linux': {
+        'mixins': [
+          'linux-xenial',
+        ],
+        'test_suites': {
+          'gtest_tests': 'layout_ng_gtests',
+          'isolated_scripts': 'chromium_webkit_isolated_scripts',
+        },
+      },
+    },
+  },
   {
     'name': 'client.openscreen.chromium',
     'machines': {},

tools/mb/mb_config.pyl

@@ -508,6 +508,10 @@
       'windows-sdk-multirel': 'release_bot_x86_minimal_symbols',
     },
 
+    'client.devtools-frontend.integration': {
+      'DevTools Linux': 'release_bot',
+    },
+
     'client.openscreen.chromium': {
       'chromium_linux64_debug': 'debug_bot',
       'chromium_mac_debug': 'debug_bot',