Part 1.1: 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 b049bf6c87966def6e30c4eb3fb72696f106021d..62e306dfca1780c76e2efd2126213bbe3415ef95 100644
--- a/third_party/WebKit/Source/core/frame/csp/CSPSource.h
+++ b/third_party/WebKit/Source/core/frame/csp/CSPSource.h
@@ -32,6 +32,11 @@ class CORE_EXPORT CSPSource : public GarbageCollectedFinalized<CSPSource> {
                ResourceRequest::RedirectStatus =
                    ResourceRequest::RedirectStatus::NoRedirect) const;
 
+  // Check whether this CSPSource is subsuming of a given CSPSource for a

[jochen (gone - plz use gerrit), 2016/11/04 09:15:43]

not sure whether subsuming *of* is correct english, I'll defer to Mike on that

[Mike West, 2016/11/04 09:48:10]

I'd say "this CSPSource _subsumes_ a given CSPSource".

+  // subsumption algorithm described here:
+  // https://w3c.github.io/webappsec-csp/embedded/#subsume-policy
+  bool isSubsumingOf(CSPSource*);
+
   DECLARE_TRACE();
 
  private: