Provide child/frame IDs for WebSocket handshake request

content/public/browser/websocket_handshake_request_info.h

Index: content/public/browser/websocket_handshake_request_info.h
diff --git a/content/public/browser/websocket_handshake_request_info.h b/content/public/browser/websocket_handshake_request_info.h
new file mode 100644
index 0000000000000000000000000000000000000000..def71272d6be7640d68e537511f9eb8ca5e7974c
--- /dev/null
+++ b/content/public/browser/websocket_handshake_request_info.h
@@ -0,0 +1,34 @@
+// 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_BROWSER_WEBSOCKET_HANDSHAKE_REQUEST_INFO_H_
+#define CONTENT_PUBLIC_BROWSER_WEBSOCKET_HANDSHAKE_REQUEST_INFO_H_
+
+#include "content/common/content_export.h"
+
+namespace net {
+class URLRequest;
+}  // namespace net
+
+namespace content {
+
+// WebSocketHandshakeRequestInfo provides additional information attached to
+// a net::URLRequest.
+class WebSocketHandshakeRequestInfo {
+ public:
+  virtual ~WebSocketHandshakeRequestInfo() {}
+  // Returns the ID of the child process where the WebSocket connection lives.
+  virtual int GetChildId() const = 0;
+  // Returns the ID of the renderer frame where the WebSocket connection lives.
+  virtual int GetRenderFrameId() const = 0;
+
+  // Returns the WebSocketHandshakeRequestInfo instance attached to the given
+  // URLRequest. Returns nullptr when no instance is attached.
+  CONTENT_EXPORT static const WebSocketHandshakeRequestInfo* ForRequest(
+      const net::URLRequest* request);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_WEBSOCKET_HANDSHAKE_REQUEST_INFO_H_