Revert of Split Screen mode implementation

athena/wm/split_view_controller.h

 // Copyright 2014 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.
 
 #ifndef ATHENA_WM_SPLIT_VIEW_CONTROLLER_H_
 #define ATHENA_WM_SPLIT_VIEW_CONTROLLER_H_
 
 #include "athena/wm/bezel_controller.h"
-#include "athena/wm/public/window_manager_observer.h"
-#include "athena/wm/window_overview_mode.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-
-namespace gfx {
-class Transform;
-}
 
 namespace athena {
-class WindowListProvider;
-class WindowManager;
-class WindowOverviewModeDelegate;
 
 // Responsible for entering split view mode, exiting from split view mode, and
 // laying out the windows in split view mode.
-class SplitViewController : public BezelController::ScrollDelegate,
-                            public WindowManagerObserver {
+class SplitViewController : public BezelController::ScrollDelegate {
  public:
-  SplitViewController(aura::Window* container,
-                      WindowListProvider* window_list_provider,
-                      WindowManager* window_manager);
-
+  SplitViewController();
   virtual ~SplitViewController();
 
-  bool IsSplitViewModeActive() const;
-
  private:
-  enum State {
-    // Split View mode is not active. |left_window_| and |right_window| are
-    // NULL.
-    INACTIVE,
-    // Two windows |left_window_| and |right_window| are shown side by side and
-    // there is a horizontal scroll in progress which is dragging the separator
-    // between the two windows.
-    SCROLLING,
-    // Split View mode is active with |left_window_| and |right_window| showing
-    // side by side each occupying half the screen. No scroll in progress.
-    ACTIVE
-  };
-
-  void UpdateLayout(bool animate);
-
-  void SetWindowTransform(aura::Window* left_window,
-                          const gfx::Transform& transform,
-                          bool animate);
-
-  void OnAnimationCompleted(aura::Window* window);
-
-  void UpdateSeparatorPositionFromScrollDelta(float delta);
-
-  // Returns the current activity shown to the user. Persists through the
-  // SCROLLING and ACTIVE states and gets updated if the current activity goes
-  // off screen when the user switches between activities.
-  aura::Window* GetCurrentActivityWindow();
-
   // BezelController::ScrollDelegate overrides.
   virtual void ScrollBegin(BezelController::Bezel bezel, float delta) OVERRIDE;
   virtual void ScrollEnd() OVERRIDE;
   virtual void ScrollUpdate(float delta) OVERRIDE;
   virtual bool CanScroll() OVERRIDE;
 
-  // WindowManagerObserver
-  virtual void OnOverviewModeEnter() OVERRIDE;
-  virtual void OnOverviewModeExit() OVERRIDE;
-
-  State state_;
-
-  aura::Window* container_;
-
-  // Window Manager which owns this SplitViewController.
-  // Must be non NULL for the duration of the lifetime.
-  WindowManager* window_manager_;
-
-  // Provider of the list of windows to cycle through. Not owned.
-  WindowListProvider* window_list_provider_;
-
-  // Keeps track of the current activity shown as the user switches between
-  // activities. Persists through the SCROLLING and ACTIVE states. Gets reset
-  // to NULL when overview mode is activated.
-  aura::Window* current_activity_window_;
-
-  // Windows for the left and right activities shown in SCROLLING and ACTIVE
-  // states. In INACTIVE state these are NULL.
-  aura::Window* left_window_;
-  aura::Window* right_window_;
-
-  // Position of the separator between left_window_ and right_window_ in
-  // container_ coordinates (along the x axis).
-  int separator_position_;
-
-  base::WeakPtrFactory<SplitViewController> weak_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(SplitViewController);
 };
 
 }  // namespace athena
 
 #endif  // ATHENA_WM_SPLIT_VIEW_CONTROLLER_H_