Prevent a11y on-screen keyboard from occluding active text field.

ash/wm/workspace/workspace_layout_manager.h

 // 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.
 
 #ifndef ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_
 #define ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_
 
 #include <set>
 
 #include "ash/ash_export.h"
 #include "ash/shell_observer.h"
 #include "ash/wm/window_state_observer.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_observer.h"
 #include "ui/wm/public/activation_change_observer.h"
 
 namespace aura {
 class RootWindow;
 class Window;
 }
 
 namespace ui {
 class Layer;
 }
 
 namespace ash {
 class ShelfLayoutManager;
 class WorkspaceLayoutManagerDelegate;
 
 namespace wm {
 class WindowState;
 class WMEvent;
 }
 
 // LayoutManager used on the window created for a workspace.
 class ASH_EXPORT WorkspaceLayoutManager
     : public aura::LayoutManager,
       public aura::WindowObserver,
       public aura::client::ActivationChangeObserver,
+      public keyboard::KeyboardControllerObserver,
       public ShellObserver,
       public wm::WindowStateObserver {
  public:
   explicit WorkspaceLayoutManager(aura::Window* window);
   virtual ~WorkspaceLayoutManager();
 
   void SetShelf(ShelfLayoutManager* shelf);
 
   // A delegate which can be set to add a backdrop behind the top most visible
   // window. With the call the ownership of the delegate will be transferred to
@@ skipping 23 matching lines @@
   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;
 
   // aura::client::ActivationChangeObserver overrides:
   virtual void OnWindowActivated(aura::Window* gained_active,
                                  aura::Window* lost_active) OVERRIDE;
 
+  // keyboard::KeyboardControllerObserver overrides:
+  virtual void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) OVERRIDE;
+
   // WindowStateObserver overrides:
   virtual void OnPostWindowStateTypeChange(
       wm::WindowState* window_state,
       wm::WindowStateType old_type) OVERRIDE;
 
  private:
   typedef std::set<aura::Window*> WindowSet;
 
   // Adjusts the bounds of all managed windows when the display area changes.
   // This happens when the display size, work area insets has changed.
@@ skipping 39 matching lines @@
   // A window which covers the full container and which gets inserted behind the
   // topmost visible window.
   scoped_ptr<WorkspaceLayoutManagerDelegate> backdrop_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkspaceLayoutManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_WORKSPACE_LAYOUT_MANAGER_H_