Add LockLayoutManager responsible for lock container (login/lock).

ash/wm/lock_layout_manager.h

Index: ash/wm/lock_layout_manager.h
diff --git a/ash/wm/lock_layout_manager.h b/ash/wm/lock_layout_manager.h
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index 0000000000000000000000000000000000000000..5c4e8faf35f0259866671b92693784f4e805e411
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+++ b/ash/wm/lock_layout_manager.h
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+// 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 ASH_WM_LOCK_LAYOUT_MANAGER_H_
+#define ASH_WM_LOCK_LAYOUT_MANAGER_H_
+
+#include "ash/ash_export.h"
+#include "ash/shell_delegate.h"
+#include "ash/wm/wm_types.h"
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/aura/layout_manager.h"
+#include "ui/aura/window_observer.h"
+#include "ui/gfx/rect.h"
+#include "ui/keyboard/keyboard_controller.h"
+#include "ui/keyboard/keyboard_controller_observer.h"
+
+namespace aura {
+class RootWindow;
+class Window;
+}
+
+namespace ui {
+class Layer;
+}
+
+namespace ash {
+namespace wm {
+class WindowState;
+class WMEvent;
+}
+
+// LockLayoutManager is used for the windows created in LockScreenContainer.
+// For Chrome OS this includes out-of-box/login/lock/multi-profile login use
+// cases. LockScreenContainer does not use default work area definition.
+// By default work area is defined as display area minus shelf, docked windows
+// and minus virtual keyboard bounds.
+// For windows in LockScreenContainer work area is display area minus virtual
+// keyboard bounds (only if keyboard overscroll is disabled). If keyboard
+// overscroll is enabled then work area always equals to display area size since
+// virtual keyboard changes inner workspace of each WebContents.
+// For all windows in LockScreenContainer default wm::WindowState is replaced
+// with LockWindowState.
+class ASH_EXPORT LockLayoutManager
+    : public aura::LayoutManager,
+      public aura::WindowObserver,
+      public VirtualKeyboardStateObserver,
+      public keyboard::KeyboardControllerObserver {
+ public:
+  explicit LockLayoutManager(aura::Window* window);
+  virtual ~LockLayoutManager();
+
+  // Overridden from aura::LayoutManager:
+  virtual void OnWindowResized() OVERRIDE;
+  virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
+  virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
+  virtual void OnWindowRemovedFromLayout(aura::Window* child) OVERRIDE;
+  virtual void OnChildWindowVisibilityChanged(aura::Window* child,
+                                              bool visibile) OVERRIDE;
+  virtual void SetChildBounds(aura::Window* child,
+                              const gfx::Rect& requested_bounds) OVERRIDE;
+
+  // Overriden from aura::WindowObserver:
+  virtual void OnWindowHierarchyChanged(
+      const WindowObserver::HierarchyChangeParams& params) OVERRIDE;
+  virtual void OnWindowPropertyChanged(aura::Window* window,
+                                       const void* key,
+                                       intptr_t old) OVERRIDE;
+  virtual void OnWindowStackingChanged(aura::Window* window) OVERRIDE;
+  virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
+  virtual void OnWindowBoundsChanged(aura::Window* window,
+                                     const gfx::Rect& old_bounds,
+                                     const gfx::Rect& new_bounds) OVERRIDE;
+
+  // VirtualKeyboardStateObserver overrides:
+  virtual void OnVirtualKeyboardStateChanged(bool activated) OVERRIDE;
+
+  // keyboard::KeyboardControllerObserver overrides:
+  virtual void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) OVERRIDE;
+
+ private:
+  // Adjusts the bounds of all managed windows when the display area changes.
+  // This happens when the display size, work area insets has changed.
+  void AdjustWindowsForWorkAreaChange(const wm::WMEvent* event);
+
+  // Remove a window from our tracking list.
+  void ForgetWindow(aura::Window* window);
+
+  aura::Window* window_;
+  aura::Window* root_window_;
+
+  // True is subscribed as keyboard controller observer.
+  bool is_observing_keyboard_;
+
+  // The bounds of the keyboard.
+  gfx::Rect keyboard_bounds_;
+
+  DISALLOW_COPY_AND_ASSIGN(LockLayoutManager);
+};
+
+}  // namespace ash
+
+#endif  // ASH_WM_LOCK_LAYOUT_MANAGER_H_