Revert of athena: Add a minimized state for the home-card.

athena/wm/window_manager_impl.cc

Index: athena/wm/window_manager_impl.cc
diff --git a/athena/wm/window_manager_impl.cc b/athena/wm/window_manager_impl.cc
index cbdd1e67e42aea7731a435e5fd45bb8c29660cc6..6c1bc8736f5ae28b0d180da6a4fbe75d9a93c40f 100644
--- a/athena/wm/window_manager_impl.cc
+++ b/athena/wm/window_manager_impl.cc
@@ -6,10 +6,8 @@
 
 #include "athena/input/public/accelerator_manager.h"
 #include "athena/screen/public/screen_manager.h"
-#include "athena/wm/public/window_manager_observer.h"
 #include "athena/wm/window_overview_mode.h"
 #include "base/logging.h"
-#include "base/observer_list.h"
 #include "ui/aura/layout_manager.h"
 #include "ui/aura/window.h"
 #include "ui/wm/public/window_types.h"
@@ -31,15 +29,10 @@
 
   // WindowManager:
   virtual void ToggleOverview() OVERRIDE {
-    if (overview_) {
+    if (overview_)
       overview_.reset();
-      FOR_EACH_OBSERVER(WindowManagerObserver, observers_,
-                        OnOverviewModeExit());
-    } else {
+    else
       overview_ = WindowOverviewMode::Create(container_.get(), this);
-      FOR_EACH_OBSERVER(WindowManagerObserver, observers_,
-                        OnOverviewModeEnter());
-    }
   }
 
  private:
@@ -56,22 +49,11 @@
         accelerator_data, arraysize(accelerator_data), this);
   }
 
-  // WindowManager:
-  virtual void AddObserver(WindowManagerObserver* observer) OVERRIDE {
-    observers_.AddObserver(observer);
-  }
-
-  virtual void RemoveObserver(WindowManagerObserver* observer) OVERRIDE {
-    observers_.RemoveObserver(observer);
-  }
-
   // WindowOverviewModeDelegate:
   virtual void OnSelectWindow(aura::Window* window) OVERRIDE {
     CHECK_EQ(container_.get(), window->parent());
     container_->StackChildAtTop(window);
     overview_.reset();
-    FOR_EACH_OBSERVER(WindowManagerObserver, observers_,
-                      OnOverviewModeExit());
   }
 
   // aura::WindowObserver
@@ -94,7 +76,6 @@
 
   scoped_ptr<aura::Window> container_;
   scoped_ptr<WindowOverviewMode> overview_;
-  ObserverList<WindowManagerObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManagerImpl);
 };
@@ -175,10 +156,4 @@
   DCHECK(!instance);
 }
 
-// static
-WindowManager* WindowManager::GetInstance() {
-  DCHECK(instance);
-  return instance;
-}
-
 }  // namespace athena