Refactor LauncherDelegate

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index c32371fc00d46d4c007dac8fdb99e3959833a4e5..96a89217a37c0c17c8b885936a37987488329940 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -23,7 +23,10 @@
 #include "ash/focus_cycler.h"
 #include "ash/high_contrast/high_contrast_controller.h"
 #include "ash/host/root_window_host_factory.h"
+#include "ash/launcher/app_list_launcher_item_delegate.h"
 #include "ash/launcher/launcher_delegate.h"
+#include "ash/launcher/launcher_item_delegate.h"
+#include "ash/launcher/launcher_item_delegate_manager.h"
 #include "ash/launcher/launcher_model.h"
 #include "ash/magnifier/magnification_controller.h"
 #include "ash/magnifier/partial_magnification_controller.h"
@@ -865,9 +868,13 @@ SystemTray* Shell::GetPrimarySystemTray() {
 
 LauncherDelegate* Shell::GetLauncherDelegate() {
   if (!launcher_delegate_) {
+    // Creates LauncherItemDelegateManager before LauncherDelegate.
+    launcher_item_delegate_manager_.reset(new LauncherItemDelegateManager);
     launcher_model_.reset(new LauncherModel);
     launcher_delegate_.reset(
         delegate_->CreateLauncherDelegate(launcher_model_.get()));
+    app_list_launcher_item_delegate_.reset(
+        new internal::AppListLauncherItemDelegate);
   }
   return launcher_delegate_.get();
 }