CSP: Enable out of blink enforcement of frame-ancestors.

Bug: 1032139
Change-Id: Iac59a5e6c8452da0cf7e7ebc549a10d8970cc8c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1988684Reviewed-by: Nasko Oskov <nasko@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Lucas Gadani <lfg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#729823}

services/network/public/cpp/features.cc

@@ -160,8 +160,8 @@ const base::Feature kDisableKeepaliveFetch{"DisableKeepaliveFetch",
 // When kOutOfBlinkFrameAncestors is enabled, the frame-ancestors
 // directive is parsed from the Content-Security-Policy header in the network
 // service and enforced in the browser.
-const base::Feature kOutOfBlinkFrameAncestors{
-    "OutOfBlinkFrameAncestors", base::FEATURE_DISABLED_BY_DEFAULT};
+const base::Feature kOutOfBlinkFrameAncestors{"OutOfBlinkFrameAncestors",
+                                              base::FEATURE_ENABLED_BY_DEFAULT};
 
 bool ShouldEnableOutOfBlinkCorsForTesting() {
   return base::FeatureList::IsEnabled(features::kOutOfBlinkCors);

third_party/blink/web_tests/VirtualTestSuites

@@ -643,9 +643,9 @@
     "args": ["--enable-blink-features=CSSModules"]
   },
   {
-    "prefix": "out-of-blink-frame-ancestors",
+    "prefix": "out-of-blink-frame-ancestors-disabled",
     "bases": ["external/wpt/content-security-policy/frame-ancestors", "external/wpt/portals/csp"],
-    "args": ["--enable-features=OutOfBlinkFrameAncestors"]
+    "args": ["--disable-features=OutOfBlinkFrameAncestors"]
   },
   {
     "prefix": "import-maps-disabled",

third_party/blink/web_tests/virtual/out-of-blink-frame-ancestors/README.md → third_party/blink/web_tests/virtual/out-of-blink-frame-ancestors-disabled/README.md

-This directory is for testing out-of-blink frame-ancestors CSP enforcement.
+This directory is for testing out-of-blink frame-ancestors CSP enforcement
+disabled.
 
-This test suite runs the tests with --enable-features=OutOfBlinkFrameAncestors.
+This test suite runs the tests with --disable-features=OutOfBlinkFrameAncestors.
 
 - https://crbug.com/759184

third_party/blink/web_tests/virtual/out-of-blink-frame-ancestors/external/wpt/portals/csp/frame-ancestors.sub-expected.txt

-This is a testharness.js-based test.
-PASS Violation report status OK.
-Harness: the test ran to completion.
-