Enforce naming convention in test/

Bug: chromium:1057042
Change-Id: Ib95f2640b1acf525cd12e377f0118377ddbe6077
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2695568
Reviewed-by: Mathias Bynens <[email protected]>
Reviewed-by: Jack Franklin <[email protected]>
Commit-Queue: Sigurd Schneider <[email protected]>
diff --git a/test/e2e/helpers/performance-helpers.ts b/test/e2e/helpers/performance-helpers.ts
index 4824caf..025cc9e 100644
--- a/test/e2e/helpers/performance-helpers.ts
+++ b/test/e2e/helpers/performance-helpers.ts
@@ -70,9 +70,9 @@
 }
 
 export async function retrieveSelectedAndExpandedActivityItems(frontend: puppeteer.Page) {
-  const tree_items = await frontend.$$('.expanded > td.activity-column,.selected > td.activity-column');
+  const treeItems = await frontend.$$('.expanded > td.activity-column,.selected > td.activity-column');
   const tree = [];
-  for (const item of tree_items) {
+  for (const item of treeItems) {
     tree.push(await frontend.evaluate(el => el.innerText.split('\n')[0], item));
   }