Add a new field "source" in launchData of chrome.app.runtime.onLaunched() to trace launch source.

chrome/browser/apps/app_shim/extension_app_shim_handler_mac.cc

 // Copyright 2013 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/apps/app_shim/extension_app_shim_handler_mac.h"
 
 #include "apps/app_lifetime_monitor_factory.h"
 #include "apps/launcher.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
@@ skipping 10 matching lines @@
 #include "chrome/common/mac/app_shim_messages.h"
 #include "components/crx_file/id_util.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
 #include "extensions/browser/app_window/app_window.h"
 #include "extensions/browser/app_window/app_window_registry.h"
 #include "extensions/browser/app_window/native_app_window.h"
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/extension_registry.h"
+#include "extensions/common/constants.h"
 #include "ui/base/cocoa/focus_window_set.h"
 
 using extensions::AppWindow;
 using extensions::AppWindowRegistry;
 using extensions::ExtensionRegistry;
 
 namespace {
 
 typedef AppWindowRegistry::AppWindowList AppWindowList;
 
@@ skipping 137 matching lines @@
   (new EnableViaPrompt(profile, extension_id, callback))->Run();
 }
 
 void ExtensionAppShimHandler::Delegate::LaunchApp(
     Profile* profile,
     const extensions::Extension* extension,
     const std::vector<base::FilePath>& files) {
   CoreAppLauncherHandler::RecordAppLaunchType(
       extension_misc::APP_LAUNCH_CMD_LINE_APP, extension->GetType());
   if (files.empty()) {
-    apps::LaunchPlatformApp(profile, extension);
+    apps::LaunchPlatformApp(
+        profile, extension, extensions::SOURCE_COMMAND_LINE);
   } else {
     for (std::vector<base::FilePath>::const_iterator it = files.begin();
          it != files.end(); ++it) {
       apps::LaunchPlatformAppWithPath(profile, extension, *it);
     }
   }
 }
 
 void ExtensionAppShimHandler::Delegate::LaunchShim(
     Profile* profile,
@@ skipping 348 matching lines @@
   if (hosts_.empty())
     delegate_->MaybeTerminate();
 }
 
 void ExtensionAppShimHandler::OnAppStop(Profile* profile,
                                         const std::string& app_id) {}
 
 void ExtensionAppShimHandler::OnChromeTerminating() {}
 
 }  // namespace apps