Embedding-CSP: Adding `const` to method signatures.

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

Index: third_party/WebKit/Source/core/frame/csp/SourceListDirective.h
diff --git a/third_party/WebKit/Source/core/frame/csp/SourceListDirective.h b/third_party/WebKit/Source/core/frame/csp/SourceListDirective.h
index aba6762151100fb05fed48a4d239e4af1c1b51ef..6a3bbd58a09897178dcb45bc8e92cb1a484fea46 100644
--- a/third_party/WebKit/Source/core/frame/csp/SourceListDirective.h
+++ b/third_party/WebKit/Source/core/frame/csp/SourceListDirective.h
@@ -46,11 +46,11 @@ class CORE_EXPORT SourceListDirective final : public CSPDirective {
   bool isNone() const;
   bool isHashOrNoncePresent() const;
   uint8_t hashAlgorithmsUsed() const;
-  bool allowAllInline();
+  bool allowAllInline() const;
 
   // The algorothm is described more extensively here:
   // https://w3c.github.io/webappsec-csp/embedded/#subsume-source-list
-  bool subsumes(HeapVector<Member<SourceListDirective>>);
+  bool subsumes(const HeapVector<Member<SourceListDirective>>&) const;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(SourceListDirectiveTest, GetIntersectCSPSources);
@@ -98,9 +98,9 @@ class CORE_EXPORT SourceListDirective final : public CSPDirective {
 
   bool hasSourceMatchInList(const KURL&, ResourceRequest::RedirectStatus) const;
   HeapVector<Member<CSPSource>> getIntersectCSPSources(
-      HeapVector<Member<CSPSource>> other);
+      const HeapVector<Member<CSPSource>>& other) const;
   HeapHashMap<String, Member<CSPSource>> getIntersectSchemesOnly(
-      HeapVector<Member<CSPSource>> other);
+      const HeapVector<Member<CSPSource>>& other) const;
 
   Member<ContentSecurityPolicy> m_policy;
   HeapVector<Member<CSPSource>> m_list;