[huntie]

Summary

Addresses a small correctness/usability bug with WebSocket events in React Native DevTools.

The bug

Previously, the reported call stack for Network.webSocketCreated CDP events starts at the WebSocket constructor's own frame. DevTools hides that frame while any non-ignore-listed frame exists (i.e. in product code), but for sockets opened entirely from framework code, such as Metro's /hot Fast Refresh connection, every frame is ignore-listed and the Initiator column falls back to the top frame, showing WebSocket.js:147.

Fix

__NETWORK_REPORTER__.createDevToolsRequestId now takes an optional framesToSkip count, dropped from the serialized CDP call frames, and WebSocket passes 1 for its constructor. The top frame is then the caller of new WebSocket(), matching Chrome's initiator semantics for a native API, so /hot resolves to metro-runtime's HMRClient.

Before	After
⚠️ Internal call site (1) resolves to WebSocket.js, which isn't particularly useful (internals of the WebSocket API itself)	✅ Internal call site resolves to HMRClient.js (Metro hot reload client, more useful) ✅ Product call site unchanged

Notes

• The skip is applied to the serialized frames rather than through RuntimeTargetDelegate::captureStackTrace(framesToSkip), which the console path already uses to mean the host-function frame that Hermes strips itself.

This is the last known bug I had tracked before enabling WS support everywhere in #59683.

Changelog:
[General][Fixed] - React Native DevTools: Fix the initiator of WebSocket connections opened from framework code, such as Metro's Fast Refresh socket, in the Network panel

Test Plan

• yarn flow-check, ESLint and Prettier on the changed files.
• Added testWebSocketCreatedWithInitiatorFramesToSkip. ⚠️ Not run locally: jsinspector-modern tests have no OSS build.
• RNTester on an iOS 27.2 simulator with fuseboxWebSocketEventsEnabled, React Native DevTools Network panel, Initiator column. Product-code sockets were opened from a local RNTester example covering four call-site shapes:

Socket	Before	After
Metro /hot	WebSocket.js:147	HMRClient.js:24
new WebSocket() in a press handler	WebSocketExample.js:167	unchanged
Via a helper function	WebSocketExample.js:130	unchanged
Inside setTimeout	WebSocketExample.js:180	unchanged
From a WebSocket subclass constructor	WebSocketExample.js:133	unchanged