Add UMA for app info dialog

chrome/browser/ui/app_list/app_context_menu.cc

Index: chrome/browser/ui/app_list/app_context_menu.cc
diff --git a/chrome/browser/ui/app_list/app_context_menu.cc b/chrome/browser/ui/app_list/app_context_menu.cc
index ede059983368c9c7f1309452811a2a630420b589..a5f0b719980ddc137ca0de8c4ad2c3f4c9b6bac1 100644
--- a/chrome/browser/ui/app_list/app_context_menu.cc
+++ b/chrome/browser/ui/app_list/app_context_menu.cc
@@ -6,12 +6,14 @@
 
 #include "base/bind.h"
 #include "base/command_line.h"
+#include "base/metrics/histogram.h"
 #include "chrome/browser/extensions/context_menu_matcher.h"
 #include "chrome/browser/extensions/menu_manager.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_list/app_context_menu_delegate.h"
 #include "chrome/browser/ui/app_list/app_list_controller_delegate.h"
+#include "chrome/browser/ui/apps/app_info_dialog.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/manifest_url_handler.h"
 #include "content/public/common/context_menu_params.h"
@@ -254,6 +256,9 @@ void AppContextMenu::ExecuteCommand(int command_id, int event_flags) {
   } else if (command_id == CREATE_SHORTCUTS) {
     controller_->DoCreateShortcutsFlow(profile_, app_id_);
   } else if (command_id == SHOW_APP_INFO) {
+    UMA_HISTOGRAM_ENUMERATION("Apps.AppInfoDialogLaunched",
+                              AppInfoDialogLaunchSource::FROM_APP_LIST,
+                              AppInfoDialogLaunchSource::NUM_LAUNCH_SOURCES);
     controller_->DoShowAppInfoFlow(profile_, app_id_);
   } else if (command_id >= USE_LAUNCH_TYPE_COMMAND_START &&
              command_id < USE_LAUNCH_TYPE_COMMAND_END) {