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

ash/root_window_controller.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/root_window_controller.h"
 
 #include <queue>
 #include <vector>
 
 #include "ash/ash_constants.h"
@@ skipping 670 matching lines @@
     keyboard::KeyboardController* keyboard_controller) {
   if (!keyboard::IsKeyboardEnabled() ||
       GetContainer(kShellWindowId_VirtualKeyboardContainer)) {
     return;
   }
   DCHECK(keyboard_controller);
   if (!keyboard::IsKeyboardUsabilityExperimentEnabled()) {
     keyboard_controller->AddObserver(shelf()->shelf_layout_manager());
     keyboard_controller->AddObserver(panel_layout_manager_);
     keyboard_controller->AddObserver(docked_layout_manager_);
+    keyboard_controller->AddObserver(workspace_controller_->layout_manager());
     Shell::GetInstance()->delegate()->VirtualKeyboardActivated(true);
   }
   aura::Window* parent = GetContainer(
       kShellWindowId_VirtualKeyboardParentContainer);
   DCHECK(parent);
   aura::Window* keyboard_container =
       keyboard_controller->GetContainerWindow();
   keyboard_container->set_id(kShellWindowId_VirtualKeyboardContainer);
   parent->AddChild(keyboard_container);
   // TODO(oshima): Bounds of keyboard container should be handled by
@@ skipping 14 matching lines @@
         kShellWindowId_VirtualKeyboardParentContainer);
     DCHECK(parent);
     parent->RemoveChild(keyboard_container);
     if (!keyboard::IsKeyboardUsabilityExperimentEnabled()) {
       // Virtual keyboard may be deactivated while still showing, notify all
       // observers that keyboard bounds changed to 0 before remove them.
       keyboard_controller->NotifyKeyboardBoundsChanging(gfx::Rect());
       keyboard_controller->RemoveObserver(shelf()->shelf_layout_manager());
       keyboard_controller->RemoveObserver(panel_layout_manager_);
       keyboard_controller->RemoveObserver(docked_layout_manager_);
+      keyboard_controller->RemoveObserver(
+          workspace_controller_->layout_manager());
       Shell::GetInstance()->delegate()->VirtualKeyboardActivated(false);
     }
   }
 }
 
 bool RootWindowController::IsVirtualKeyboardWindow(aura::Window* window) {
   aura::Window* parent = GetContainer(
       kShellWindowId_VirtualKeyboardParentContainer);
   return parent ? parent->Contains(window) : false;
 }
@@ skipping 362 matching lines @@
   else
     DisableTouchHudProjection();
 }
 
 RootWindowController* GetRootWindowController(
     const aura::Window* root_window) {
   return root_window ? GetRootWindowSettings(root_window)->controller : NULL;
 }
 
 }  // namespace ash