[FeaturePolicy] Initial implementation of Feature Policy

third_party/WebKit/Source/platform/network/HTTPParsers.cpp

Index: third_party/WebKit/Source/platform/network/HTTPParsers.cpp
diff --git a/third_party/WebKit/Source/platform/network/HTTPParsers.cpp b/third_party/WebKit/Source/platform/network/HTTPParsers.cpp
index 37a2afc1cf8f4bdacfd1fee67145ba951f01826e..6c63320df54ecca0c957694d33d0bdd81b9d42d0 100644
--- a/third_party/WebKit/Source/platform/network/HTTPParsers.cpp
+++ b/third_party/WebKit/Source/platform/network/HTTPParsers.cpp
@@ -34,6 +34,7 @@
 
 #include "net/http/http_response_headers.h"
 #include "net/http/http_util.h"
+#include "platform/json/JSONParser.h"
 #include "platform/network/ResourceResponse.h"
 #include "platform/weborigin/Suborigin.h"
 #include "public/platform/WebString.h"
@@ -877,4 +878,16 @@ bool parseMultipartHeadersFromBody(const char* bytes,
   return true;
 }
 
+// See https://tools.ietf.org/html/draft-ietf-httpbis-jfv-01, Section 4.
+std::unique_ptr<JSONArray> parseJSONHeader(const String& header) {
+  StringBuilder sb;
+  sb.append("[");
+  sb.append(header);
+  sb.append("]");
+  std::unique_ptr<JSONValue> headerValue = parseJSON(sb.toString());
+  if (!headerValue)
+    return std::unique_ptr<JSONArray>(nullptr);  // Header is not valid JSON
+  return JSONArray::cast(std::move(headerValue));
+}
+
 }  // namespace blink