Drag and drop between app list and launcher - First patch

ash/launcher/launcher_delegate.h

Index: ash/launcher/launcher_delegate.h
diff --git a/ash/launcher/launcher_delegate.h b/ash/launcher/launcher_delegate.h
index 45109e86fd50492ab57d4d67788609831de842dc..0bd8ec66295539c8e0afe731dbc6d9f82bb6b209 100644
--- a/ash/launcher/launcher_delegate.h
+++ b/ash/launcher/launcher_delegate.h
@@ -106,6 +106,18 @@ class ASH_EXPORT LauncherDelegate {
 
   // True if the running launcher is the per application launcher.
   virtual bool IsPerAppLauncher() = 0;
+
+  // Get the launcher ID from an application ID.
+  virtual LauncherID GetLauncherIDForAppID(const std::string& app_id) = 0;
+
+  // Pins an app with |app_id| to launcher. A running instance will get pinned.
+  // In case there is no running instance a new launcher item is created and
+  // pinned.
+  virtual void PinAppWithID(const std::string& app_id) = 0;
+
+  // Unpins any app item(s) whose id is |app_id|. The new launcher will collect
+  // all items under one item, the old launcher might have multiple items.
+  virtual void UnpinAppsWithID(const std::string& app_id) = 0;
 };
 
 }  // namespace ash