Generate FYI bot config for linux-blink-wpt-reset-rel.

Updates trybot configs to add a blink web/wpt test runner that resets
the BrowsingInstance in between every test. Flakiness data from this bot will be compared the wpt/web test flakiness on linux-rel to determine which tests may benefit from having the reset applied.

This bot is modeled on linux-blink-rel, but with a longer timeout since the BrowsingInstance reset slows down the tests.

Bug: 1227911, 1366972
Change-Id: Ib71396f7e0d273913eceba3ebc65fd7435a2a777
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3869445
Commit-Queue: James Maclean <[email protected]>
Reviewed-by: Ben Pastene <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1055354}
diff --git a/testing/buildbot/test_suite_exceptions.pyl b/testing/buildbot/test_suite_exceptions.pyl
index b5d4831..6059d34e 100644
--- a/testing/buildbot/test_suite_exceptions.pyl
+++ b/testing/buildbot/test_suite_exceptions.pyl
@@ -464,6 +464,18 @@
           '--flag-specific=force-renderer-accessibility',
         ],
       },
+      'linux-blink-wpt-reset-rel': {
+        'args': [
+          '--additional-driver-flag=--force-browsing-instance-reset-between-tests',
+        ],
+        # The flag above will slow the tests down, and we don't want the bot to
+        # timeout, so set a higher timeout here.
+        # TODO(wjmaclean): It would be nice if we could somehow specify a delta
+        # to the default/inherited timeout instead of an absolute.
+        'swarming': {
+          'hard_timeout': 1500,
+        },
+      },
       'linux-code-coverage': {
         'args': [
           '--additional-env-var=LLVM_PROFILE_FILE=${ISOLATED_OUTDIR}/profraw/default-%2m.profraw',
@@ -762,6 +774,11 @@
           '--flag-specific=force-renderer-accessibility',
         ],
       },
+      'linux-blink-wpt-reset-rel': {
+        'args': [
+          '--additional-driver-flag=--force-browsing-instance-reset-between-tests',
+        ],
+      },
       'linux-code-coverage': {
         'args': [
           '--additional-env-var=LLVM_PROFILE_FILE=${ISOLATED_OUTDIR}/profraw/default-%2m.profraw',