Add support for pinning platform apps

chrome/browser/ui/views/ash/launcher/chrome_launcher_controller.h

Index: chrome/browser/ui/views/ash/launcher/chrome_launcher_controller.h
diff --git a/chrome/browser/ui/views/ash/launcher/chrome_launcher_controller.h b/chrome/browser/ui/views/ash/launcher/chrome_launcher_controller.h
index ae1b654b6508c657b2a219e26df07c63745c283e..c56483388c784f42f5a6909816544092addd1a79 100644
--- a/chrome/browser/ui/views/ash/launcher/chrome_launcher_controller.h
+++ b/chrome/browser/ui/views/ash/launcher/chrome_launcher_controller.h
@@ -105,6 +105,9 @@ class ChromeLauncherController : public ash::LauncherDelegate,
   // Invoked when the underlying browser/app is closed.
   void LauncherItemClosed(ash::LauncherID id);
 
+  // Pins the specified id. Currently only supports platform apps.
+  void Pin(ash::LauncherID id);
+
   // Unpins the specified id, closing if not running.
   void Unpin(ash::LauncherID id);
 
@@ -221,8 +224,6 @@ class ChromeLauncherController : public ash::LauncherDelegate,
     Item();
     ~Item();
 
-    bool is_pinned() const { return controller == NULL; }
-
     // Type of item.
     ItemType item_type;