Provide child/frame IDs for WebSocket handshake request

AndroidCookiePolicy needs the child ID and the frame ID of a WebSocket
connection to determine if it allows the connection to attach
third-party cookies. This CL provide the additional information to the
WebSocket handshake net::URLRequest.

BUG=634311

Review-Url: https://codereview.chromium.org/2397393002
Cr-Commit-Position: refs/heads/master@{#427109}
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index 819f89f..9365a8de 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -1349,6 +1349,8 @@
     "web_contents/web_drag_source_mac.mm",
     "web_contents/web_drag_utils_win.cc",
     "web_contents/web_drag_utils_win.h",
+    "websockets/websocket_handshake_request_info_impl.cc",
+    "websockets/websocket_handshake_request_info_impl.h",
     "websockets/websocket_impl.cc",
     "websockets/websocket_impl.h",
     "websockets/websocket_manager.cc",