Part 2.3: Is policy list subsumed under subsuming policy?

third_party/WebKit/Source/core/frame/csp/CSPSource.h

Index: third_party/WebKit/Source/core/frame/csp/CSPSource.h
diff --git a/third_party/WebKit/Source/core/frame/csp/CSPSource.h b/third_party/WebKit/Source/core/frame/csp/CSPSource.h
index 63e9cae422f94b43bb086747f19a0d9d10633831..31882d8643a191cfb0ff483709f99ef3145784da 100644
--- a/third_party/WebKit/Source/core/frame/csp/CSPSource.h
+++ b/third_party/WebKit/Source/core/frame/csp/CSPSource.h
@@ -28,6 +28,7 @@ class CORE_EXPORT CSPSource : public GarbageCollectedFinalized<CSPSource> {
             const String& path,
             WildcardDisposition hostWildcard,
             WildcardDisposition portWildcard);
+  bool isSchemeOnly() const;
   bool matches(const KURL&,
                ResourceRequest::RedirectStatus =
                    ResourceRequest::RedirectStatus::NoRedirect) const;
@@ -44,13 +45,14 @@ class CORE_EXPORT CSPSource : public GarbageCollectedFinalized<CSPSource> {
  private:
   FRIEND_TEST_ALL_PREFIXES(CSPSourceTest, IsSimilar);
   FRIEND_TEST_ALL_PREFIXES(SourceListDirectiveTest, GetIntersectCSPSources);
+  FRIEND_TEST_ALL_PREFIXES(SourceListDirectiveTest,
+                           GetIntersectCSPSourcesSchemes);
 
   bool schemeMatches(const String&) const;
   bool hostMatches(const String&) const;
   bool pathMatches(const String&) const;
   // Protocol is necessary to determine default port if it is zero.
   bool portMatches(int port, const String& protocol) const;
-  bool isSchemeOnly() const;
   bool isSimilar(CSPSource* other);
 
   Member<ContentSecurityPolicy> m_policy;