Add Lantern settings to trace engine options

Lighthouse needs this.

Bug: 388723721
Change-Id: I76d3ce7eff44274ce72b8c38733add8d6f0ae518
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6345303
Commit-Queue: Adam Raine <[email protected]>
Auto-Submit: Connor Clark <[email protected]>
Commit-Queue: Connor Clark <[email protected]>
Reviewed-by: Adam Raine <[email protected]>

Author: Connor Clark

front_end/models/trace/Processor.ts

@@ -287,7 +287,7 @@ export class TraceProcessor extends EventTarget {
 
   #createLanternContext(
       parsedTrace: Handlers.Types.ParsedTrace, traceEvents: readonly Types.Events.Event[], frameId: string,
-      navigationId: string): Insights.Types.LanternContext|undefined {
+      navigationId: string, options: Types.Configuration.ParseOptions): Insights.Types.LanternContext|undefined {
     // Check for required handlers.
     if (!parsedTrace.NetworkRequests || !parsedTrace.Workers || !parsedTrace.PageLoadMetrics) {
       return;
@@ -321,13 +321,15 @@ export class TraceProcessor extends EventTarget {
       return;
     }
 
+    const lanternSettings: Lantern.Types.Simulation.Settings = {
+      // TODO(crbug.com/372674229): if devtools throttling was on, does this network analysis capture
+      // that? Do we need to set 'devtools' throttlingMethod?
+      networkAnalysis,
+      throttlingMethod: 'provided',
+      ...options.lanternSettings,
+    };
     const simulator: Lantern.Simulation.Simulator<Types.Events.SyntheticNetworkRequest> =
-        Lantern.Simulation.Simulator.createSimulator({
-          // TODO(crbug.com/372674229): if devtools throttling was on, does this network analysis capture
-          // that? Do we need to set 'devtools' throttlingMethod?
-          networkAnalysis,
-          throttlingMethod: 'provided',
-        });
+        Lantern.Simulation.Simulator.createSimulator(lanternSettings);
 
     const computeData = {graph, simulator, processedNavigation};
     const fcpResult = Lantern.Metrics.FirstContentfulPaint.compute(computeData);
@@ -541,7 +543,7 @@ export class TraceProcessor extends EventTarget {
       let lantern;
       try {
         options.logger?.start('insights:createLanternContext');
-        lantern = this.#createLanternContext(parsedTrace, traceEvents, frameId, navigationId);
+        lantern = this.#createLanternContext(parsedTrace, traceEvents, frameId, navigationId, options);
       } catch (e) {
         // Don't allow an error in constructing the Lantern graphs to break the rest of the trace processor.
         // Log unexpected errors, but suppress anything that occurs from a trace being too old.

front_end/models/trace/lantern/types/BUILD.gn

@@ -10,7 +10,7 @@ import("../../../visibility.gni")
 devtools_module("types") {
   sources = [ "Lantern.ts" ]
 
-  deps = [ "../../types:bundle" ]
+  deps = [ "../../../../generated" ]
 }
 
 devtools_entrypoint("bundle") {

front_end/models/trace/types/BUILD.gn

@@ -20,6 +20,7 @@ devtools_module("types") {
     "../../../core/sdk:bundle",
     "../../../generated",
     "../../crux-manager:bundle",
+    "../lantern:bundle",
   ]
 }
 

front_end/models/trace/types/Configuration.ts

@@ -5,6 +5,7 @@
 import type * as Platform from '../../../core/platform/platform.js';
 import type * as SDK from '../../../core/sdk/sdk.js';
 import type * as Protocol from '../../../generated/protocol.js';
+import type * as Lantern from '../lantern/lantern.js';
 
 import type * as File from './File.js';
 
@@ -73,6 +74,7 @@ export interface ParseOptions {
     start: (id: string) => void,
     end: (id: string) => void,
   };
+  lanternSettings?: Omit<Lantern.Types.Simulation.Settings, 'networkAnalysis'>;
 }
 
 export interface ResolveSourceMapParams {