Move container policy logic to frame owner classes.

third_party/WebKit/Source/core/html/HTMLIFrameElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLIFrameElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLIFrameElement.cpp b/third_party/WebKit/Source/core/html/HTMLIFrameElement.cpp
index 0a9e723d661e0c70d8d428c5e4c11ffd87252239..a61d13530c5ddad50337b6ed61d78babb85b6169 100644
--- a/third_party/WebKit/Source/core/html/HTMLIFrameElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLIFrameElement.cpp
@@ -198,6 +198,49 @@ void HTMLIFrameElement::ParseAttribute(
   }
 }
 
+Vector<WebParsedFeaturePolicyDeclaration>
+HTMLIFrameElement::ConstructContainerPolicy() const {
+  Vector<WebParsedFeaturePolicyDeclaration> container_policy =
+      HTMLFrameOwnerElement::ConstructContainerPolicy();
+
+  // If allowfullscreen attribute is present and no fullscreen policy is set,
+  // enable the feature for all origins; similarly for allowpaymentrequest.
+  if (AllowFullscreen()) {
+    bool can_override_fullscreen = true;
+    for (const auto& declaration : container_policy) {
+      if (declaration.feature == WebFeaturePolicyFeature::kFullscreen) {
+        can_override_fullscreen = false;
+        break;
+      }
+    }
+    if (can_override_fullscreen) {
+      WebParsedFeaturePolicyDeclaration whitelist;
+      whitelist.feature = WebFeaturePolicyFeature::kFullscreen;
+      whitelist.matches_all_origins = true;
+      whitelist.origins = Vector<WebSecurityOrigin>(0UL);
+      container_policy.push_back(whitelist);
+    }
+  }
+  if (AllowPaymentRequest()) {
+    bool can_override_payment = true;
+    for (const auto& declaration : container_policy) {
+      if (declaration.feature == WebFeaturePolicyFeature::kPayment) {
+        can_override_payment = false;
+        break;
+      }
+    }
+    if (can_override_payment) {
+      WebParsedFeaturePolicyDeclaration whitelist;
+      whitelist.feature = WebFeaturePolicyFeature::kPayment;
+      whitelist.matches_all_origins = true;
+      whitelist.origins = Vector<WebSecurityOrigin>(0UL);
+      container_policy.push_back(whitelist);
+    }
+  }
+
+  return container_policy;
+}
+
 bool HTMLIFrameElement::LayoutObjectIsNeeded(const ComputedStyle& style) {
   return ContentFrame() && !collapsed_by_client_ &&
          HTMLElement::LayoutObjectIsNeeded(style);