Make "source" a required argument of AppLaunchParams and fill in the argument in all call points.

chrome/browser/ui/extensions/app_launch_params.cc

 // Copyright 2014 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/ui/extensions/app_launch_params.h"
 
 #include "chrome/browser/extensions/launch_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "extensions/browser/extension_prefs.h"
+#include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
 
 using extensions::ExtensionPrefs;
 
 AppLaunchParams::AppLaunchParams(Profile* profile,
                                  const extensions::Extension* extension,
                                  extensions::LaunchContainer container,
-                                 WindowOpenDisposition disposition)
+                                 WindowOpenDisposition disposition,
+                                 extensions::AppLaunchSource source)
     : profile(profile),
       extension_id(extension ? extension->id() : std::string()),
       container(container),
       disposition(disposition),
       desktop_type(chrome::GetActiveDesktop()),
       override_url(),
       override_bounds(),
       command_line(CommandLine::NO_PROGRAM),
-      source(extensions::SOURCE_UNTRACKED) {
+      source(source) {
 }
 
 AppLaunchParams::AppLaunchParams(Profile* profile,
                                  const extensions::Extension* extension,
-                                 WindowOpenDisposition disposition)
+                                 WindowOpenDisposition disposition,
+                                 extensions::AppLaunchSource source)
     : profile(profile),
       extension_id(extension ? extension->id() : std::string()),
       container(extensions::LAUNCH_CONTAINER_NONE),
       disposition(disposition),
       desktop_type(chrome::GetActiveDesktop()),
       override_url(),
       override_bounds(),
       command_line(CommandLine::NO_PROGRAM),
-      source(extensions::SOURCE_UNTRACKED) {
+      source(source) {
   // Look up the app preference to find out the right launch container. Default
   // is to launch as a regular tab.
   container =
       extensions::GetLaunchContainer(ExtensionPrefs::Get(profile), extension);
 }
 
 AppLaunchParams::AppLaunchParams(Profile* profile,
                                  const extensions::Extension* extension,
                                  int event_flags,
-                                 chrome::HostDesktopType desktop_type)
+                                 chrome::HostDesktopType desktop_type,
+                                 extensions::AppLaunchSource source)
     : profile(profile),
       extension_id(extension ? extension->id() : std::string()),
       container(extensions::LAUNCH_CONTAINER_NONE),
       disposition(ui::DispositionFromEventFlags(event_flags)),
       desktop_type(desktop_type),
       override_url(),
       override_bounds(),
       command_line(CommandLine::NO_PROGRAM),
-      source(extensions::SOURCE_UNTRACKED) {
+      source(source) {
   if (disposition == NEW_FOREGROUND_TAB || disposition == NEW_BACKGROUND_TAB) {
     container = extensions::LAUNCH_CONTAINER_TAB;
   } else if (disposition == NEW_WINDOW) {
     container = extensions::LAUNCH_CONTAINER_WINDOW;
   } else {
     // Look at preference to find the right launch container.  If no preference
     // is set, launch as a regular tab.
     container =
         extensions::GetLaunchContainer(ExtensionPrefs::Get(profile), extension);
     disposition = NEW_FOREGROUND_TAB;
   }
 }
 
 AppLaunchParams::~AppLaunchParams() {
 }