Implement without patch retries and src-side script for webview_licenses.py

testing/buildbot/chromium.linux.json

 {
   "Linux Tests": {
     "gtest_tests": [
       {
         "test": "accessibility_unittests",
         "swarming": {
           "can_use_on_swarming_builders": true
         }
       },
       {
@@ skipping 536 matching lines @@
       "mojo_public_utility_unittests",
       "mojo_system_unittests",
       "nacl_loader_unittests",
       "sandbox_linux_unittests",
       "sql_unittests",
       "sync_unit_tests",
       "ui_base_unittests",
       "unit_tests",
       "skia_unittests"
     ]
+  },
+  "Android Tests (dbg)": {
+    "scripts": [
+      {
+        "name": "check_licenses",
+        "script": "webview_licenses.py"
+      }
+    ]
+  },
+  "Android Tests": {
+    "scripts": [
+      {
+        "name": "check_licenses",
+        "script": "webview_licenses.py"
+      }
+    ]
   }
 }