Use mojo app list interfaces for mash and classic ash.

ash/shell/content/client/shell_browser_main_parts.h

Index: ash/shell/content/client/shell_browser_main_parts.h
diff --git a/ash/shell/content/client/shell_browser_main_parts.h b/ash/shell/content/client/shell_browser_main_parts.h
index d63384839c138de5564f1b0d4992e750e08ce48b..a6fe25eec33afa89705a3d0d0e6e18e2599c7912 100644
--- a/ash/shell/content/client/shell_browser_main_parts.h
+++ b/ash/shell/content/client/shell_browser_main_parts.h
@@ -30,6 +30,7 @@ class WMState;
 namespace ash {
 namespace shell {
 
+class ExampleAppListPresenter;
 class ShellDelegateImpl;
 class WindowWatcher;
 
@@ -57,6 +58,7 @@ class ShellBrowserMainParts : public content::BrowserMainParts {
   std::unique_ptr<ash::shell::WindowWatcher> window_watcher_;
   ShellDelegateImpl* delegate_;  // owned by Shell
   std::unique_ptr<wm::WMState> wm_state_;
+  std::unique_ptr<ExampleAppListPresenter> example_app_list_presenter_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellBrowserMainParts);
 };