Convert Site Isolation Win bot to --isolate-extensions [2nd attempt].

testing/buildbot/chromium.fyi.json

 {
   "Android Asan Builder Tests (dbg)": {
     "gtest_tests": [
       {
         "args": [
           "--tool=asan"
         ],
         "swarming": {
           "can_use_on_swarming_builders": false
         },
@@ skipping 11861 matching lines @@
           "can_use_on_swarming_builders": true
         },
         "test": "unit_tests"
       }
     ]
   },
   "Site Isolation Win": {
     "gtest_tests": [
       {
         "args": [
-          "--site-per-process"
+          "--isolate-extensions"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "app_shell_unittests"
       },
       {
         "args": [
-          "--site-per-process",
-          "--test-launcher-filter-file=../../testing/buildbot/filters/site-per-process.browser_tests.filter"
+          "--isolate-extensions",
+          "--test-launcher-filter-file=../../testing/buildbot/filters/isolate-extensions.browser_tests.filter"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "browser_tests"
       },
       {
         "args": [
-          "--site-per-process"
+          "--isolate-extensions"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "components_browsertests"
       },
       {
         "args": [
-          "--site-per-process"
+          "--isolate-extensions"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "components_unittests"
       },
       {
         "args": [
-          "--site-per-process",
-          "--test-launcher-filter-file=../../testing/buildbot/filters/site-per-process.content_browsertests.filter"
+          "--isolate-sites-for-testing=*.is",
+          "--test-launcher-filter-file=../../testing/buildbot/filters/isolate-extensions.content_browsertests.filter"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "content_browsertests"
       },
       {
         "args": [
-          "--site-per-process"
+          "--isolate-sites-for-testing=*.is"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "content_unittests"
       },
       {
         "args": [
-          "--site-per-process"
+          "--isolate-sites-for-testing=chrome-extension://*"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "extensions_browsertests"
       },
       {
         "args": [
-          "--site-per-process"
+          "--isolate-sites-for-testing=chrome-extension://*"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "extensions_unittests"
       },
       {
         "args": [
-          "--site-per-process"
+          "--isolate-extensions"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "installer_util_unittests"
       },
       {
         "args": [
-          "--site-per-process"
+          "--isolate-extensions"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "interactive_ui_tests"
       },
       {
         "args": [
-          "--site-per-process"
+          "--isolate-extensions"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "nacl_loader_unittests"
       },
       {
         "args": [
-          "--site-per-process"
+          "--isolate-extensions"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "sync_integration_tests"
       },
       {
         "args": [
-          "--site-per-process"
+          "--isolate-extensions"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "unit_tests"
       }
     ]
   },
   "ThinLTO Linux ToT": {
     "gtest_tests": [
@@ skipping 942 matching lines @@
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "views_unittests"
       }
     ]
   }
 }