Making ResourceRequestBody part of //content's public API.

content/public/common/resource_request_body.h

+// Copyright 2016 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.
+
+#ifndef CONTENT_PUBLIC_COMMON_RESOURCE_REQUEST_BODY_H_
+#define CONTENT_PUBLIC_COMMON_RESOURCE_REQUEST_BODY_H_
+
+#include <stdint.h>
+
+#include <vector>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+// ResourceRequestBody represents body (i.e. upload data) of a HTTP request.
+//
+// This class is intentionally opaque:
+// - Embedders cannot inspect the payload of ResourceRequestBody.  Only the
+//   //content layer can decompose ResourceRequestBody into references to file
+//   ranges, byte vectors, blob uris, etc.
+// - Embedders can get instances of ResourceRequestBody only by receiving an
+//   instance created inside //content layer (e.g. receiving it via
+//   content::OpenURLParams).
+// - Embedders typically end up passing ResourceRequestBody back into the
+//   //content layer via content::NavigationController::LoadUrlParams.
+class CONTENT_EXPORT ResourceRequestBody
+    : public base::RefCountedThreadSafe<ResourceRequestBody> {
+ protected:
+  ResourceRequestBody();
+  virtual ~ResourceRequestBody();
+
+ private:
+  friend class base::RefCountedThreadSafe<ResourceRequestBody>;
+  DISALLOW_COPY_AND_ASSIGN(ResourceRequestBody);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_COMMON_RESOURCE_REQUEST_BODY_H_