Discard pinning an app with non-empty launcher id.

chrome/browser/ui/ash/chrome_launcher_prefs.h

Index: chrome/browser/ui/ash/chrome_launcher_prefs.h
diff --git a/chrome/browser/ui/ash/chrome_launcher_prefs.h b/chrome/browser/ui/ash/chrome_launcher_prefs.h
index 1ec582a0ba135497deaeac9504cba5d32412f1b4..9a53322b1ea8ab24dccbaab2dee3c46bd7db0fa6 100644
--- a/chrome/browser/ui/ash/chrome_launcher_prefs.h
+++ b/chrome/browser/ui/ash/chrome_launcher_prefs.h
@@ -17,10 +17,6 @@ class LauncherControllerHelper;
 class PrefService;
 class Profile;
 
-namespace base {
-class DictionaryValue;
-}
-
 namespace sync_preferences {
 class PrefServiceSyncable;
 }
@@ -51,46 +47,9 @@ extern const char kShelfAlignmentBottom[];
 extern const char kShelfAlignmentLeft[];
 extern const char kShelfAlignmentRight[];
 
-// A unique chrome launcher id used to identify a shelf item. This class is a
-// wrapper for the chrome launcher identifier. |app_launcher_id_| includes the
-// |app_id| and the |launch_id|. The |app_id| is the application id associated
-// with a set of windows. The |launch_id| is an id that can be passed to an app
-// when launched in order to support multiple shelf items per app. This id is
-// used together with the |app_id| to uniquely identify each shelf item that
-// has the same |app_id|. The |app_id| must not be empty.
-class AppLauncherId {
- public:
-  AppLauncherId(const std::string& app_id, const std::string& launch_id);
-  // Creates an AppLauncherId with an empty |launch_id|.
-  explicit AppLauncherId(const std::string& app_id);
-  // Empty constructor for pre-allocating.
-  AppLauncherId();
-  ~AppLauncherId();
-
-  AppLauncherId(const AppLauncherId& app_launcher_id) = default;
-  AppLauncherId(AppLauncherId&& app_launcher_id) = default;
-  AppLauncherId& operator=(const AppLauncherId& other) = default;
-
-  std::string ToString() const;
-  const std::string& app_id() const { return app_id_; }
-  const std::string& launch_id() const { return launch_id_; }
-
-  bool operator<(const AppLauncherId& other) const;
-
- private:
-  // The application id associated with a set of windows.
-  std::string app_id_;
-  // An id that can be passed to an app when launched in order to support
-  // multiple shelf items per app.
-  std::string launch_id_;
-};
-
 void RegisterChromeLauncherUserPrefs(
     user_prefs::PrefRegistrySyncable* registry);
 
-std::unique_ptr<base::DictionaryValue> CreateAppDict(
-    const AppLauncherId& app_launcher_id);
-
 // Get or set the shelf auto hide behavior preference for a particular display.
 ShelfAutoHideBehavior GetShelfAutoHideBehaviorPref(PrefService* prefs,
                                                    int64_t display_id);
@@ -105,21 +64,21 @@ void SetShelfAlignmentPref(PrefService* prefs,
                            ShelfAlignment alignment);
 
 // Get the list of pinned apps from preferences.
-std::vector<AppLauncherId> GetPinnedAppsFromPrefs(
+std::vector<std::string> GetPinnedAppsFromPrefs(
     const PrefService* prefs,
     LauncherControllerHelper* helper);
 
 // Removes information about pin position from sync model for the app.
-void RemovePinPosition(Profile* profile, const AppLauncherId& app_launcher_id);
+void RemovePinPosition(Profile* profile, const std::string& app_id);
 
-// Updates information about pin position in sync model for the app
-// |app_launcher_id|. |app_launcher_id_before| optionally specifies an app that
-// exists right before the target app. |app_launcher_ids_after| optionally
-// specifies sorted by position apps that exist right after the target app.
+// Updates information about pin position in sync model for the app |app_id|.
+// |app_id_before| optionally specifies an app that exists right before the
+// target app. |app_ids_after| optionally specifies sorted by position apps that
+// exist right after the target app.
 void SetPinPosition(Profile* profile,
-                    const AppLauncherId& app_launcher_id,
-                    const AppLauncherId& app_launcher_id_before,
-                    const std::vector<AppLauncherId>& app_launcher_ids_after);
+                    const std::string& app_id,
+                    const std::string& app_id_before,
+                    const std::vector<std::string>& app_ids_after);
 
 // Used to propagate remote preferences to local during the first run.
 class ChromeLauncherPrefsObserver