Feature policy: Add basic algorithm for supporting frame policies.

third_party/WebKit/Source/core/dom/SecurityContext.cpp

Index: third_party/WebKit/Source/core/dom/SecurityContext.cpp
diff --git a/third_party/WebKit/Source/core/dom/SecurityContext.cpp b/third_party/WebKit/Source/core/dom/SecurityContext.cpp
index dfce6551911360c73671df76b692b549be74aa97..14d425847b26cbb678d3634eacd1c9cb8b484d0e 100644
--- a/third_party/WebKit/Source/core/dom/SecurityContext.cpp
+++ b/third_party/WebKit/Source/core/dom/SecurityContext.cpp
@@ -103,8 +103,10 @@ void SecurityContext::setFeaturePolicyFromHeader(
     const WebParsedFeaturePolicy& parsedHeader,
     FeaturePolicy* parentFeaturePolicy) {
   DCHECK(!m_featurePolicy);
-  m_featurePolicy = FeaturePolicy::createFromParentPolicy(parentFeaturePolicy,
-                                                          m_securityOrigin);
+  // TODO(iclelland): Use the frame owner properties here to pass the frame
+  // policy, if it exists.
+  m_featurePolicy = FeaturePolicy::createFromParentPolicy(
+      parentFeaturePolicy, nullptr, m_securityOrigin);
   m_featurePolicy->setHeaderPolicy(parsedHeader);
 }