Partial fix for keyboard occlusion.

ash/root_window_controller.cc

Index: ash/root_window_controller.cc
diff --git a/ash/root_window_controller.cc b/ash/root_window_controller.cc
index 991f1eb2127d6ced2657b9058acbffc9d6083d42..d8162c7def9f518c5fbe19d51ce1e7faeca6de2d 100644
--- a/ash/root_window_controller.cc
+++ b/ash/root_window_controller.cc
@@ -477,8 +477,13 @@ void RootWindowController::InitKeyboard() {
         Shell::GetInstance()->delegate()->CreateKeyboardControllerProxy();
     keyboard_controller_.reset(
         new keyboard::KeyboardController(proxy));
+
+    keyboard_controller_->AddObserver(shelf()->shelf_layout_manager());
+    keyboard_controller_->AddObserver(panel_layout_manager_);
+
     aura::Window* keyboard_container =
         keyboard_controller_->GetContainerWindow();
+
     parent->AddChild(keyboard_container);
     keyboard_container->SetBounds(parent->bounds());
   }