PlzNavigate: store POST data in the FrameNavigationEntry

content/common/resource_request_body.h

Index: content/common/resource_request_body.h
diff --git a/content/common/resource_request_body.h b/content/common/resource_request_body.h
index 9c87e570661c746f1edcf2e30dc72bc0aa969060..69e3d5d8228444d4997e6eef941a8dff505b963e 100644
--- a/content/common/resource_request_body.h
+++ b/content/common/resource_request_body.h
@@ -22,6 +22,8 @@ class FilePath;
 
 namespace content {
 
+struct ExplodedHttpBodyElement;
+
 // A struct used to represent upload data. The data field is populated by
 // WebURLLoader from the data given as WebHTTPBody.
 class CONTENT_EXPORT ResourceRequestBody
@@ -32,6 +34,8 @@ class CONTENT_EXPORT ResourceRequestBody
 
   ResourceRequestBody();
 
+  void AppendExplodedHTTPBodyElement(const ExplodedHttpBodyElement& element);
+
   void AppendBytes(const char* bytes, int bytes_len);
   void AppendFileRange(const base::FilePath& file_path,
                        uint64_t offset,
@@ -55,6 +59,9 @@ class CONTENT_EXPORT ResourceRequestBody
   void set_identifier(int64_t id) { identifier_ = id; }
   int64_t identifier() const { return identifier_; }
 
+  // Returns a copy of this ResourceRequestBody.
+  scoped_refptr<ResourceRequestBody> MakeCopy();
+
  private:
   friend class base::RefCountedThreadSafe<ResourceRequestBody>;
   ~ResourceRequestBody() override;