Add virtual test suite for document policy

Bug: 993790
Change-Id: If427b1a27cbd4e67f6296c91936389eb3d8c6215
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1960515
Auto-Submit: Ian Clelland <iclelland@chromium.org>
Reviewed-by: Jason Chase <chasej@chromium.org>
Commit-Queue: Jason Chase <chasej@chromium.org>
Cr-Commit-Position: refs/heads/master@{#723540}

third_party/blink/web_tests/TestExpectations

@@ -6051,6 +6051,10 @@ crbug.com/993790 external/wpt/document-policy/required-policy/document-policy.ht
 crbug.com/993790 external/wpt/document-policy/required-policy/no-document-policy.html [ Failure ]
 crbug.com/993790 external/wpt/document-policy/required-policy/required-document-policy-nested.html [ Failure ]
 crbug.com/993790 external/wpt/document-policy/required-policy/required-document-policy.html [ Failure ]
+crbug.com/993790 virtual/document-policy/external/wpt/document-policy/required-policy/document-policy.html [ Failure ]
+crbug.com/993790 virtual/document-policy/external/wpt/document-policy/required-policy/no-document-policy.html [ Failure ]
+crbug.com/993790 virtual/document-policy/external/wpt/document-policy/required-policy/required-document-policy-nested.html [ Failure ]
+crbug.com/993790 virtual/document-policy/external/wpt/document-policy/required-policy/required-document-policy.html [ Failure ]
 
 # Temporary suppression to allow devtools-frontend changes
 crbug.com/1029489 http/tests/devtools/elements/elements-linkify-attributes.js [ Pass Failure ]

third_party/blink/web_tests/VirtualTestSuites

@@ -632,6 +632,11 @@
     "bases": ["external/wpt/fetch/http-cache"],
     "args": ["--disable-features=SplitCacheByNetworkIsolationKey"]
   },
+  {
+    "prefix": "document-policy",
+    "bases": ["external/wpt/document-policy"],
+    "args": ["--enable-features=DocumentPolicy"]
+  },
   {
     "prefix": "web-components-v0-disabled",
     "bases": ["external/wpt/dom",

third_party/blink/web_tests/virtual/document-policy/external/wpt/document-policy/README.txt

+This test contains expectations for document policy web platform tests when
+run with document policy enabled.