Load the calculator app by default

athena/main/athena_main.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 "apps/shell/app/shell_main_delegate.h"
 #include "apps/shell/browser/shell_browser_main_delegate.h"
 #include "apps/shell/browser/shell_desktop_controller.h"
 #include "apps/shell/browser/shell_extension_system.h"
 #include "apps/shell/renderer/shell_renderer_main_delegate.h"
 #include "athena/content/public/content_activity_factory.h"
 #include "athena/content/public/content_app_model_builder.h"
 #include "athena/home/public/home_card.h"
 #include "athena/main/athena_app_window_controller.h"
 #include "athena/main/athena_launcher.h"
 #include "athena/main/placeholder.h"
 #include "athena/main/url_search_provider.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "content/public/app/content_main.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/wm/core/visibility_controller.h"
 
 namespace {
-const std::string kAppSwitch = "app";
+const char kAppSwitch[] = "app";
+
+// We want to load the sample calculator app by default, for a while. Expecting
+// to run athena_main at src/
+const char kDefaultAppPath[] =
+    "chrome/common/extensions/docs/examples/apps/calculator/app";
 }  // namespace
 
 class AthenaBrowserMainDelegate : public apps::ShellBrowserMainDelegate {
  public:
   AthenaBrowserMainDelegate() {}
   virtual ~AthenaBrowserMainDelegate() {}
 
   // apps::ShellBrowserMainDelegate:
   virtual void Start(content::BrowserContext* context) OVERRIDE {
     base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
-    if (command_line->HasSwitch(kAppSwitch)) {
-      base::FilePath app_dir(command_line->GetSwitchValueNative(kAppSwitch));
-      base::FilePath app_absolute_dir = base::MakeAbsoluteFilePath(app_dir);
+    base::FilePath app_dir = base::FilePath::FromUTF8Unsafe(
+        command_line->HasSwitch(kAppSwitch) ?
+        command_line->GetSwitchValueNative(kAppSwitch) :
+        kDefaultAppPath);
+
+    base::FilePath app_absolute_dir = base::MakeAbsoluteFilePath(app_dir);
+    if (base::DirectoryExists(app_absolute_dir)) {
       extensions::ShellExtensionSystem* extension_system =
           static_cast<extensions::ShellExtensionSystem*>(
               extensions::ExtensionSystem::Get(context));
       extension_system->LoadApp(app_absolute_dir);
     }
 
     athena::StartAthena(
         apps::ShellDesktopController::instance()->host()->window(),
         new athena::ContentActivityFactory(),
         new athena::ContentAppModelBuilder(context));
@@ skipping 53 matching lines @@
 
 int main(int argc, const char** argv) {
   AthenaMainDelegate delegate;
   content::ContentMainParams params(&delegate);
 
   params.argc = argc;
   params.argv = argv;
 
   return content::ContentMain(params);
 }