Record omnibox app launches in AppLaunch histogram.

chrome/browser/extensions/extension_omnibox_api.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/extension_omnibox_api.h"
 
 #include "base/json/json_writer.h"
 #include "base/lazy_instance.h"
+#include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_event_router.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/browser/ui/browser.h"
+#include "chrome/common/extensions/extension_constants.h"
 #include "content/common/notification_service.h"
 
 namespace events {
 const char kOnInputStarted[] = "omnibox.onInputStarted";
 const char kOnInputChanged[] = "omnibox.onInputChanged";
 const char kOnInputEntered[] = "omnibox.onInputEntered";
 const char kOnInputCancelled[] = "omnibox.onInputCancelled";
 };  // namespace events
 
 namespace {
@@ skipping 243 matching lines @@
                           WindowOpenDisposition disposition) {
   ExtensionService* service = profile->GetExtensionService();
   const Extension* extension =
       service->GetInstalledApp(match.destination_url);
   // While the Omnibox popup is open, the extension can be updated, changing
   // its URL and leaving us with no extension being found. In this case, we
   // ignore the request.
   if (!extension)
     return;
 
+  UMA_HISTOGRAM_ENUMERATION(extension_misc::kAppLaunchHistogram,
+                            extension_misc::APP_LAUNCH_OMNIBOX_APP,
+                            extension_misc::APP_LAUNCH_BUCKET_BOUNDARY);
+
   // Look at the preferences to find the right launch container.  If no
   // preference is set, launch as a regular tab.
   extension_misc::LaunchContainer launch_container =
       service->extension_prefs()->GetLaunchContainer(
           extension, ExtensionPrefs::LAUNCH_REGULAR);
 
   Browser::OpenApplication(profile, extension, launch_container, disposition);
 }