Revert 133089 - Implement LauncherIconObserver.

ash/launcher/launcher.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/launcher/launcher.h"
 
 #include "ash/focus_cycler.h"
 #include "ash/launcher/launcher_delegate.h"
 #include "ash/launcher/launcher_model.h"
 #include "ash/launcher/launcher_view.h"
@@ skipping 168 matching lines @@
     return bounds;
 
   gfx::Point screen_origin;
   views::View::ConvertPointToScreen(launcher_view_, &screen_origin);
   return gfx::Rect(screen_origin.x() + bounds.x(),
                    screen_origin.y() + bounds.y(),
                    bounds.width(),
                    bounds.height());
 }
 
-void Launcher::AddIconObserver(LauncherIconObserver* observer) {
-  launcher_view_->AddIconObserver(observer);
-}
-
-void Launcher::RemoveIconObserver(LauncherIconObserver* observer) {
-  launcher_view_->RemoveIconObserver(observer);
-}
-
 bool Launcher::IsShowingMenu() const {
   return launcher_view_->IsShowingMenu();
 }
 
 internal::LauncherView* Launcher::GetLauncherViewForTest() {
   return launcher_view_;
 }
 
 void Launcher::UpdateBackground(int alpha) {
   ui::Layer* layer = widget_->GetNativeView()->layer();
   layer->SetColor(SkColorSetARGB(alpha, 0, 0, 0));
 }
 
 }  // namespace ash