Remove all blimp engine code

blimp/engine/app/ui/blimp_layout_manager.cc

-// Copyright 2015 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 "blimp/engine/app/ui/blimp_layout_manager.h"
-
-#include "ui/aura/window.h"
-
-namespace blimp {
-namespace engine {
-
-BlimpLayoutManager::BlimpLayoutManager(aura::Window* root_window)
-    : root_window_(root_window) {}
-
-BlimpLayoutManager::~BlimpLayoutManager() {}
-
-void BlimpLayoutManager::OnWindowResized() {}
-
-void BlimpLayoutManager::OnWindowAddedToLayout(aura::Window* child) {
-  child->SetBounds(root_window_->bounds());
-}
-
-void BlimpLayoutManager::OnWillRemoveWindowFromLayout(aura::Window* child) {}
-
-void BlimpLayoutManager::OnWindowRemovedFromLayout(aura::Window* child) {}
-
-void BlimpLayoutManager::OnChildWindowVisibilityChanged(aura::Window* child,
-                                                        bool visible) {}
-
-void BlimpLayoutManager::SetChildBounds(aura::Window* child,
-                                        const gfx::Rect& requested_bounds) {
-  SetChildBoundsDirect(child, root_window_->bounds());
-}
-
-}  // namespace engine
-}  // namespace blimp