chrome: Cleanup class/struct forward declarations

chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h
index 44c677510d006fd28ef6247e2f04acd1a982dcfc..c1991c00423fb6e1dd792e221fc1b4e546c6d7a5 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h
@@ -28,7 +28,6 @@ class AppSyncUIState;
 class BrowserStatusMonitor;
 class Profile;
 class AppWindowLauncherController;
-class TabContents;
 
 namespace ash {
 class ShelfModel;
@@ -37,18 +36,10 @@ class ChromeLauncherPrefsObserver;
 }
 }
 
-namespace aura {
-class Window;
-}
-
 namespace content {
 class BrowserContext;
 }
 
-namespace extensions {
-class Extension;
-}
-
 class ChromeLauncherControllerUserSwitchObserver;
 
 // Implementation of ChromeLauncherController, used for classic Ash.