[Extensions] Quick comment change for method consistency.

Bug: None
Change-Id: Ie1dffb756ad1c391f728abe5a55f3ce5b5d0ae4e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2505553Reviewed-by: Karan Bhatia <karandeepb@chromium.org>
Commit-Queue: Solomon Kinard <solomonkinard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#822198}

extensions/browser/renderer_startup_helper.cc

@@ -158,7 +158,7 @@ void RendererStartupHelper::InitializeProcess(
   const ExtensionSet& extensions =
       ExtensionRegistry::Get(browser_context_)->enabled_extensions();
   for (const auto& ext : extensions) {
-    // OnLoadedExtension should have already been called for the extension.
+    // OnExtensionLoaded should have already been called for the extension.
     DCHECK(base::Contains(extension_process_map_, ext->id()));
     DCHECK(!base::Contains(extension_process_map_[ext->id()], process));