PlzNavigate: Enforce 'frame-src' CSP on the browser.

content/browser/frame_host/frame_tree_node.cc

Index: content/browser/frame_host/frame_tree_node.cc
diff --git a/content/browser/frame_host/frame_tree_node.cc b/content/browser/frame_host/frame_tree_node.cc
index 655c46092ccd43acb579fd8813a123639ebb8f1f..4efe83bb92cf72d7a841ebd4a351c59c3b27faf8 100644
--- a/content/browser/frame_host/frame_tree_node.cc
+++ b/content/browser/frame_host/frame_tree_node.cc
@@ -291,17 +291,14 @@ void FrameTreeNode::ResetFeaturePolicyHeader() {
 }
 
 void FrameTreeNode::AddContentSecurityPolicy(
-    const ContentSecurityPolicyHeader& header,
-    const std::vector<ContentSecurityPolicy>& policies) {
+    const ContentSecurityPolicyHeader& header) {
   replication_state_.accumulated_csp_headers.push_back(header);
   render_manager_.OnDidAddContentSecurityPolicy(header);
-  csp_policies_.insert(csp_policies_.end(), policies.begin(), policies.end());
 }
 
-void FrameTreeNode::ResetContentSecurityPolicy() {
+void FrameTreeNode::ResetCspHeaders() {
   replication_state_.accumulated_csp_headers.clear();
   render_manager_.OnDidResetContentSecurityPolicy();
-  csp_policies_.clear();
 }
 
 void FrameTreeNode::SetInsecureRequestPolicy(