athena: Use overlay scrollbars.

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 "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/debug/debug_window.h"
@@ skipping 11 matching lines @@
 #include "extensions/shell/browser/shell_content_browser_client.h"
 #include "extensions/shell/browser/shell_desktop_controller.h"
 #include "extensions/shell/browser/shell_extension_system.h"
 #include "extensions/shell/common/switches.h"
 #include "extensions/shell/renderer/shell_renderer_main_delegate.h"
 #include "ui/app_list/app_list_switches.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/keyboard/keyboard_controller.h"
 #include "ui/keyboard/keyboard_controller_observer.h"
+#include "ui/native_theme/native_theme_switches.h"
 #include "ui/wm/core/visibility_controller.h"
 
 namespace {
 
 // 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
 
@@ skipping 36 matching lines @@
  public:
   AthenaBrowserMainDelegate() {}
   virtual ~AthenaBrowserMainDelegate() {}
 
   // extensions::ShellBrowserMainDelegate:
   virtual void Start(content::BrowserContext* context) OVERRIDE {
     base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 
     // Force showing in the experimental app-list view.
     command_line->AppendSwitch(app_list::switches::kEnableExperimentalAppList);
+    command_line->AppendSwitch(switches::kEnableOverlayScrollbar);
 
     base::FilePath app_dir = base::FilePath::FromUTF8Unsafe(
         command_line->HasSwitch(extensions::switches::kAppShellAppPath)
             ? command_line->GetSwitchValueNative(
                   extensions::switches::kAppShellAppPath)
             : kDefaultAppPath);
 
     base::FilePath app_absolute_dir = base::MakeAbsoluteFilePath(app_dir);
     if (base::DirectoryExists(app_absolute_dir)) {
       extensions::ShellExtensionSystem* extension_system =
@@ skipping 102 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);
 }