Added validation of the policy specified in the 'csp' attribute

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

Index: third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.h
diff --git a/third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.h b/third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.h
index 667724a324a4bd33677d1a23a1e1315aa2eea41b..3c2fca38fee4aa742bc0995966ea4e0c754c21e4 100644
--- a/third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.h
+++ b/third_party/WebKit/Source/core/frame/csp/CSPDirectiveList.h
@@ -39,6 +39,14 @@ class CORE_EXPORT CSPDirectiveList
 
   void Parse(const UChar* begin, const UChar* end);
 
+  static bool IsValid(const UChar* begin,
+                      const UChar* end,
+                      ContentSecurityPolicyHeaderType,
+                      ContentSecurityPolicyHeaderSource);
+  static bool IsValid(const String& directive_list,
+                      ContentSecurityPolicyHeaderType,
+                      ContentSecurityPolicyHeaderSource);
+
   const String& Header() const { return header_; }
   ContentSecurityPolicyHeaderType HeaderType() const { return header_type_; }
   ContentSecurityPolicyHeaderSource HeaderSource() const {