Introduces ActivityFactory for SampleActivity.

athena/main/sample_activity.cc

-// 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.
-
-#include "athena/main/sample_activity.h"
-
-#include "ui/aura/window.h"
-
-SampleActivity::SampleActivity(SkColor color,
-                               SkColor content_color,
-                               const std::string& title)
-    : color_(color), content_color_(content_color), title_(title) {
-}
-
-SampleActivity::~SampleActivity() {
-}
-
-athena::ActivityViewModel* SampleActivity::GetActivityViewModel() {
-  return this;
-}
-
-SkColor SampleActivity::GetRepresentativeColor() {
-  return color_;
-}
-
-std::string SampleActivity::GetTitle() {
-  return title_;
-}
-
-aura::Window* SampleActivity::GetNativeWindow() {
-  if (!window_) {
-    window_.reset(new aura::Window(NULL));
-    window_->Init(aura::WINDOW_LAYER_SOLID_COLOR);
-    window_->layer()->SetColor(content_color_);
-  }
-  return window_.get();
-}