Sync fork with chromium/7103

[huntie]

Summary

Syncs the react-native-devtools-frontend fork with the upstream chromium/7103 branch (most recent stable from https://chromiumdash.appspot.com/branches).

There were a total of ~52 conflicts, resolved as below:

File conflicts

• .gitignore — Merge changes
• README.md — Keep ours
• CONTRIBUTING.md — Both added, keep ours
• config/gni/devtools_grd_files.gni — Merge changes
• front_end/BUILD.gn — Merge changes
• front_end/core/root/Runtime.ts — Merge changes
• front_end/core/sdk/Connections.ts — Merge changes
  • Preserve object arg variant of onConnectionLost introduced in Report WebSocket connection termination error code and message #156.
• front_end/core/sdk/PageResourceLoader.ts — Merge changes
  • Use upstream renamed enum keys.
• front_end/core/sdk/sdk-meta.ts — Merge changes
  • Keep our skip-stack-frames-pattern default (Restore skip-stack-frames-pattern setting with empty default #137)
• front_end/core/sdk/sdk.ts — Keep both
• front_end/entrypoints/inspector_main/BUILD.gn — Keep both
• front_end/entrypoints/main/BUILD.gn — Keep both
• front_end/entrypoints/main/MainImpl.ts — merge
• front_end/entrypoints/shell/BUILD.gn — Keep both
• front_end/models/source_map_scopes/NamesResolver.test.ts — Use upstream, then reapply Performance: hide more unsupported features #150
• front_end/models/source_map_scopes/NamesResolver.ts — Use upstream, then reapply Performance: hide more unsupported features #150
• front_end/models/trace/handlers/RendererHandler.ts — Merge
• front_end/models/trace/handlers/WarningsHandler.test.ts — Use upstream, then reapply Performance: hide more unsupported features #150
• front_end/models/trace/helpers/SyntheticEvents.test.ts — Use upstream, then reapply Performance: hide more unsupported features #150
• front_end/models/trace/insights/DocumentLatency.test.ts — Use upstream, then reapply Performance: hide more unsupported features #150
• front_end/models/trace/insights/InteractionToNextPaint.test.ts — Use upstream, then reapply Performance: hide more unsupported features #150
• front_end/models/trace/lantern/core/NetworkAnalyzer.test.ts — Use upstream, then reapply Performance: hide more unsupported features #150
• front_end/panels/console/consoleView.css — Keep both CSS additions
• front_end/panels/console/ErrorStackParser.test.ts — Use upstream, then reapply Performance: hide more unsupported features #150
• front_end/panels/network/network-meta.ts — Keep ours
• front_end/panels/network/NetworkLogView.ts — Keep our customisations
• front_end/panels/network/NetworkPanel.ts — Keep our customisations
• front_end/panels/profiler/HeapSnapshotView.ts — Merge
  • Preserve our rnPerfMetrics calls.
• front_end/panels/sources/SourcesView.ts — Use upstream
  • Conditionally hidden UI no longer present.
• front_end/panels/sources/UISourceCodeFrame.ts — Keep our customisations
• front_end/panels/timeline/EntriesFilter.test.ts — Use upstream, then reapply Performance: hide more unsupported features #150
• front_end/panels/timeline/Initiators.test.ts — Use upstream, then reapply Performance: hide more unsupported features #150
• front_end/panels/timeline/ModificationsManager.test.ts — Use upstream, then reapply Performance: hide more unsupported features #150
• front_end/panels/timeline/TimelineFlameChartDataProvider.ts — Keep our customisations
• front_end/panels/timeline/TimelinePanel.ts — Merge
  • Preserve our disabled Performance features.
• front_end/panels/timeline/TimelineLandingPage.ts — Deleted upstream
• front_end/panels/timeline/TimingsTrackAppender.ts — Use upstream
• front_end/testing/EnvironmentHelpers.ts — Keep both (experiment keys)
• front_end/third_party/additional_readme_paths.json — Keep both (manifest file)
• front_end/ui/components/input/checkbox.css — Use upstream
• front_end/ui/legacy/ActionRegistration.ts — Keep our extra icons
• front_end/ui/legacy/BUILD.gn — Merge
• front_end/ui/legacy/components/utils/TargetDetachedDialog.ts — Merge changes
  • Preserve object arg variant of connectionLost introduced in Report WebSocket connection termination error code and message #156.
• front_end/ui/legacy/inspectorCommon.css — Use upstream (not modified by us)
• front_end/ui/legacy/remoteDebuggingTerminatedScreen.css — Keep ours
• front_end/ui/legacy/RemoteDebuggingTerminatedScreen.ts — Merged
  • Keep our dialog design, lit-html -> lit.
• front_end/ui/legacy/theme_support/ThemeSupport.ts — Merge
  • Preserve our baseline-greyscale override.
• third_party/node/node.py — Use upstream (includes our fix)

Test plan

To dos

• Review end state (reapply) Performance: hide more unsupported features #150
• Review end state (reapply) Report WebSocket connection termination error code and message #156

[Incoming]

Upstreaming plan

• This commit should be sent as a patch to the upstream devtools-frontend repo. I've reviewed the contribution guide.
• This commit is React Native-specific and cannot be upstreamed.