Use the correct launcher assets for shelf alignment.

ash/launcher/tabbed_launcher_button.h

Index: ash/launcher/tabbed_launcher_button.h
diff --git a/ash/launcher/tabbed_launcher_button.h b/ash/launcher/tabbed_launcher_button.h
index f78ec07c9f20b38989d695d3e47c5058efd9af09..6eb0b9eb6aa539422c3e84810ffeda696cc2cfbd 100644
--- a/ash/launcher/tabbed_launcher_button.h
+++ b/ash/launcher/tabbed_launcher_button.h
@@ -37,6 +37,7 @@ class TabbedLauncherButton : public LauncherButton {
 
   static TabbedLauncherButton* Create(views::ButtonListener* listener,
                                       LauncherButtonHost* host,
+                                      ShelfLayoutManager* shelf_layout_manager,
                                       IncognitoState is_incognito);
   virtual ~TabbedLauncherButton();
 
@@ -49,6 +50,7 @@ class TabbedLauncherButton : public LauncherButton {
  protected:
   TabbedLauncherButton(views::ButtonListener* listener,
                        LauncherButtonHost* host,
+                       ShelfLayoutManager* shelf_layout_manager,
                        IncognitoState is_incognito);
   // View override.
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;