WebApp: Rename BookmarkAppInstallationTask to WebAppInstallTask in WebAppDataRetriever

This CL updates an old comment class name to the current name.

Change-Id: I38ef92fab6a26ed1143b3a226d8cf008a2b4352c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1751102
Auto-Submit: Alan Cutter <alancutter@chromium.org>
Reviewed-by: Alexey Baskakov <loyso@chromium.org>
Commit-Queue: Alexey Baskakov <loyso@chromium.org>
Cr-Commit-Position: refs/heads/master@{#686668}

chrome/browser/web_applications/components/web_app_data_retriever.h

@@ -33,8 +33,8 @@ namespace web_app {
 
 class WebAppIconDownloader;
 
-// Class used by BookmarkAppInstallationTask to retrieve the necessary
-// information to install an app. Should only be called from the UI thread.
+// Class used by WebAppInstallTask to retrieve the necessary information to
+// install an app. Should only be called from the UI thread.
 class WebAppDataRetriever : content::WebContentsObserver {
  public:
   // Returns nullptr for WebApplicationInfo if error.