Fix typo and add comments on confusing params

Bug: None
Test: Build, doesn't modify funcionality.
Change-Id: I5c741baea2e143884ca750eafac1070fd19c0e8d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1609592
Commit-Queue: David Jacobo <djacobo@chromium.org>
Commit-Queue: Maggie Cai <mxcai@chromium.org>
Auto-Submit: David Jacobo <djacobo@chromium.org>
Reviewed-by: Maggie Cai <mxcai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659338}

chrome/browser/chromeos/arc/intent_helper/arc_intent_picker_app_fetcher.cc

@@ -184,7 +184,7 @@ bool ArcIntentPickerAppFetcher::IsAppAvailableForTesting(
 // static
 size_t ArcIntentPickerAppFetcher::FindPreferredAppForTesting(
     const std::vector<mojom::IntentHandlerInfoPtr>& app_candidates) {
-  return FindPreferredApp(app_candidates, GURL());
+  return FindPreferredApp(app_candidates, /*url_for_logging=*/GURL());
 }
 
 ArcIntentPickerAppFetcher::~ArcIntentPickerAppFetcher() = default;
@@ -234,7 +234,7 @@ void ArcIntentPickerAppFetcher::OnAppCandidatesReceivedForNavigation(
     // created iff there are ARC apps which can actually handle the given URL.
     DVLOG(1) << "There are no app candidates for this URL: " << url;
     chromeos::ChromeOsAppsNavigationThrottle::RecordUma(
-        std::string(), apps::mojom::AppType::kUnknown,
+        /*selected_app_package=*/std::string(), apps::mojom::AppType::kUnknown,
         apps::IntentPickerCloseReason::PICKER_ERROR,
         /*should_persist=*/false);
     std::move(callback).Run(apps::AppsNavigationAction::RESUME, {});
@@ -339,7 +339,7 @@ void ArcIntentPickerAppFetcher::GetArcAppIcons(
   if (!intent_helper_bridge) {
     LOG(ERROR) << "Cannot get an instance of ArcIntentHelperBridge";
     chromeos::ChromeOsAppsNavigationThrottle::RecordUma(
-        std::string(), apps::mojom::AppType::kUnknown,
+        /*selected_app_package=*/std::string(), apps::mojom::AppType::kUnknown,
         apps::IntentPickerCloseReason::PICKER_ERROR,
         /*should_persist=*/false);
     std::move(callback).Run({});

chrome/browser/chromeos/arc/intent_helper/arc_intent_picker_app_fetcher.h

@@ -41,7 +41,7 @@ class ArcIntentPickerAppFetcher : content::WebContentsObserver {
   // the preferred app (if it exists) will be automatically launched.
   static bool WillGetArcAppsForNavigation(content::NavigationHandle* handle,
                                           apps::AppsNavigationCallback callback,
-                                          bool should_aunch_preferred_app);
+                                          bool should_launch_preferred_app);
 
   // Called to launch an ARC app if it was selected by the user, and persist the
   // preference to launch or stay in Chrome if |should_persist| is true. Returns