RPP: Log AICalltree case as warning to avoid e2e flake

Example: https://ci.chromium.org/ui/p/devtools-frontend/builders/ci/Stand-alone%20Linux/19140/overview

Change-Id: I3131103016038497f893699c62373e0523188cac
Bug: 390507733
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6216159
Commit-Queue: Connor Clark <[email protected]>
Auto-Submit: Paul Irish <[email protected]>
Reviewed-by: Connor Clark <[email protected]>

Author: paulirish

front_end/panels/timeline/utils/AICallTree.ts

@@ -76,7 +76,7 @@ export class AICallTree {
     }
 
     if (!threadEvents) {
-      console.error(`AICallTree: could not find thread for selected entry: ${selectedEvent}`);
+      console.warn(`AICallTree: could not find thread for selected entry: ${selectedEvent}`);
       return null;
     }
     const overlappingEvents = threadEvents.filter(e => Trace.Helpers.Timing.eventIsInBounds(e, selectedEventBounds));
@@ -98,7 +98,7 @@ export class AICallTree {
     });
 
     if (selectedNode === null) {
-      console.error(`Selected event ${selectedEvent} not found within its own tree.`);
+      console.warn(`Selected event ${selectedEvent} not found within its own tree.`);
       return null;
     }
     const instance = new AICallTree(selectedNode, rootNode, parsedTrace);