Initial PlzNavigate RDH-side logic.

content/public/common/resource_response.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #ifndef CONTENT_PUBLIC_COMMON_RESOURCE_RESPONSE_H_
 #define CONTENT_PUBLIC_COMMON_RESOURCE_RESPONSE_H_
 
 #include <string>
@@ skipping 22 matching lines @@
   // The final URL after any redirects.
   GURL final_url;
 
   // The response data.
   std::string data;
 };
 
 // Simple wrapper that refcounts ResourceResponseHead.
 // Inherited, rather than typedef'd, to allow forward declarations.
 struct CONTENT_EXPORT ResourceResponse
-    : public base::RefCounted<ResourceResponse> {
+    : public base::RefCountedThreadSafe<ResourceResponse> {
  public:
   ResourceResponseHead head;
 
+  // Performs a deep copy of the ResourceResponse and all fields in it, safe to
+  // pass across threads.
+  //
+  // TODO(davidben): This structure should be passed along in a scoped_ptr. It's
+  // currently reference-counted to avoid copies, but may be
+  // modified. https://crbug.com/416050
+  scoped_refptr<ResourceResponse> DeepCopy() const;
+
  private:
-  friend class base::RefCounted<ResourceResponse>;
+  friend class base::RefCountedThreadSafe<ResourceResponse>;
   ~ResourceResponse() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_RESOURCE_RESPONSE_H_