Stop recording HostedAppLaunchContainer for WebApp installs.

Same info is recorded as BookmarkAppLaunchContainer (which should be
renamed, crbug.com/1014328).
HostedAppLaunchContainer is still used for Hosted Apps.

Bug: 1160812
Change-Id: Id77df80d16f3d85a6161a224700a5fbd0765e8d5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2612286
Commit-Queue: Dominick Ng <dominickn@chromium.org>
Auto-Submit: Glen Robertson <glenrob@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#840896}

chrome/browser/ui/web_applications/web_app_engagement_browsertest.cc

@@ -116,13 +116,13 @@ void ExpectTotalCounts(const base::HistogramTester& tester,
 void ExpectLaunchCounts(const base::HistogramTester& tester,
                         base::HistogramBase::Count windowLaunches,
                         base::HistogramBase::Count tabLaunches) {
-  tester.ExpectBucketCount("Extensions.HostedAppLaunchContainer",
+  tester.ExpectBucketCount("Extensions.BookmarkAppLaunchContainer",
                            apps::mojom::LaunchContainer::kLaunchContainerWindow,
                            windowLaunches);
-  tester.ExpectBucketCount("Extensions.HostedAppLaunchContainer",
+  tester.ExpectBucketCount("Extensions.BookmarkAppLaunchContainer",
                            apps::mojom::LaunchContainer::kLaunchContainerTab,
                            tabLaunches);
-  tester.ExpectTotalCount("Extensions.HostedAppLaunchContainer",
+  tester.ExpectTotalCount("Extensions.BookmarkAppLaunchContainer",
                           windowLaunches + tabLaunches);
 
   if (tabLaunches > 0) {

chrome/browser/ui/web_applications/web_app_launch_manager.cc

@@ -236,9 +236,6 @@ content::WebContents* WebAppLaunchManager::OpenApplication(
   browser->window()->Show();
 
   // TODO(crbug.com/1014328): Populate WebApp metrics instead of Extensions.
-
-  UMA_HISTOGRAM_ENUMERATION("Extensions.HostedAppLaunchContainer",
-                            params.container);
   if (params.container == apps::mojom::LaunchContainer::kLaunchContainerTab) {
     UMA_HISTOGRAM_ENUMERATION("Extensions.AppTabLaunchType",
                               extensions::LAUNCH_TYPE_REGULAR, 100);