[trace engine] Add Lighthouse's Lantern library

This is the culmination of isolating Lighthouse's Lantern library
(GoogleChrome/lighthouse#15841). The code in
this CL took Lantern as it now exists in Lighthouse, converted to
TypeScript, integrated its unit tests (Jest -> Karma conversion), and
resolved the majority of CDT's JavaScript linter errors.

There is no behavior change to CDT with this CL, besides TraceModel
exporting the Lantern module.

A handful of eslint checks have been disabled for this folder.

Bug: 335099340
Change-Id: Ib2bf64fc17d334859caca5c42bea1e276465d64c

config/gni/devtools_grd_files.gni

@@ -491,6 +491,7 @@ grd_files_release_sources = [
   "front_end/models/trace/handlers/handlers.js",
   "front_end/models/trace/helpers/helpers.js",
   "front_end/models/trace/insights/insights.js",
+  "front_end/models/trace/lantern/lantern.js",
   "front_end/models/trace/root-causes/root-causes.js",
   "front_end/models/trace/trace.js",
   "front_end/models/trace/types/types.js",
@@ -975,6 +976,7 @@ grd_files_debug_sources = [
   "front_end/models/timeline_model/TimelineProfileTree.js",
   "front_end/models/timeline_model/TracingLayerTree.js",
   "front_end/models/trace/EntriesFilter.js",
+  "front_end/models/trace/LanternComputationData.js",
   "front_end/models/trace/ModelImpl.js",
   "front_end/models/trace/Processor.js",
   "front_end/models/trace/TracingManager.js",
@@ -1024,6 +1026,29 @@ grd_files_debug_sources = [
   "front_end/models/trace/insights/RenderBlocking.js",
   "front_end/models/trace/insights/Viewport.js",
   "front_end/models/trace/insights/types.js",
+  "front_end/models/trace/lantern/BaseNode.js",
+  "front_end/models/trace/lantern/CpuNode.js",
+  "front_end/models/trace/lantern/LanternError.js",
+  "front_end/models/trace/lantern/Metric.js",
+  "front_end/models/trace/lantern/NetworkNode.js",
+  "front_end/models/trace/lantern/PageDependencyGraph.js",
+  "front_end/models/trace/lantern/TBTUtils.js",
+  "front_end/models/trace/lantern/metrics/FirstContentfulPaint.js",
+  "front_end/models/trace/lantern/metrics/Interactive.js",
+  "front_end/models/trace/lantern/metrics/LargestContentfulPaint.js",
+  "front_end/models/trace/lantern/metrics/MaxPotentialFID.js",
+  "front_end/models/trace/lantern/metrics/SpeedIndex.js",
+  "front_end/models/trace/lantern/metrics/TotalBlockingTime.js",
+  "front_end/models/trace/lantern/metrics/metrics.js",
+  "front_end/models/trace/lantern/simulation/ConnectionPool.js",
+  "front_end/models/trace/lantern/simulation/Constants.js",
+  "front_end/models/trace/lantern/simulation/DNSCache.js",
+  "front_end/models/trace/lantern/simulation/NetworkAnalyzer.js",
+  "front_end/models/trace/lantern/simulation/SimulationTimingMap.js",
+  "front_end/models/trace/lantern/simulation/Simulator.js",
+  "front_end/models/trace/lantern/simulation/TcpConnection.js",
+  "front_end/models/trace/lantern/simulation/simulation.js",
+  "front_end/models/trace/lantern/types/lantern.js",
   "front_end/models/trace/root-causes/LayoutShift.js",
   "front_end/models/trace/root-causes/RootCauses.js",
   "front_end/models/trace/types/Configuration.js",

front_end/BUILD.gn

@@ -132,6 +132,7 @@ group("unittests") {
     "models/trace/handlers:unittests",
     "models/trace/helpers:unittests",
     "models/trace/insights:unittests",
+    "models/trace/lantern:unittests",
     "models/trace/root-causes:unittests",
     "models/trace/types:unittests",
     "models/workspace:unittests",

front_end/models/trace/BUILD.gn

@@ -10,6 +10,7 @@ import("../visibility.gni")
 devtools_module("trace") {
   sources = [
     "EntriesFilter.ts",
+    "LanternComputationData.ts",
     "ModelImpl.ts",
     "Processor.ts",
     "TracingManager.ts",
@@ -23,6 +24,7 @@ devtools_module("trace") {
     "handlers:bundle",
     "helpers:bundle",
     "insights:bundle",
+    "lantern:bundle",
     "root-causes:bundle",
     "types:bundle",
   ]
@@ -47,7 +49,6 @@ devtools_entrypoint("bundle") {
     "../../services/trace_bounds/*",
     "../../services/tracing/*",
     "../../testing/*",
-    "../../testing/*",
     "../../ui/components/docs/*",
     "../../ui/legacy/components/utils/*",
     "../timeline_model/*",