Enhance chrome.app.window API for shelf integration with restore support

apps/launcher.cc

Index: apps/launcher.cc
diff --git a/apps/launcher.cc b/apps/launcher.cc
index 1ac5aef27947de679163f78d81d4f6998fe81ea3..26871ebf72c3a3d13628c5fbea2fe98c9f58cf04 100644
--- a/apps/launcher.cc
+++ b/apps/launcher.cc
@@ -359,6 +359,7 @@ class PlatformAppPathLauncher
 
 void LaunchPlatformAppWithCommandLine(Profile* profile,
                                       const extensions::Extension* app,
+                                      const std::string& launch_id,
                                       const base::CommandLine& command_line,
                                       const base::FilePath& current_directory,
                                       extensions::AppLaunchSource source,
@@ -397,6 +398,7 @@ void LaunchPlatformAppWithCommandLine(Profile* profile,
         base::MakeUnique<app_runtime::LaunchData>();
     if (play_store_status != PlayStoreStatus::PLAY_STORE_STATUS_UNKNOWN)
       launch_data->play_store_status = play_store_status;
+    launch_data->id.reset(new std::string(launch_id));
     AppRuntimeEventRouter::DispatchOnLaunchedEvent(profile, app, source,
                                                    std::move(launch_data));
     return;
@@ -432,7 +434,7 @@ void LaunchPlatformApp(Profile* profile,
                        const Extension* app,
                        extensions::AppLaunchSource source) {
   LaunchPlatformAppWithCommandLine(
-      profile, app, base::CommandLine(base::CommandLine::NO_PROGRAM),
+      profile, app, "", base::CommandLine(base::CommandLine::NO_PROGRAM),
       base::FilePath(), source);
 }