[Chromecast] Turn CastContentWindow into an abstract interface.

chromecast/browser/test/cast_browser_test.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 "chromecast/browser/test/cast_browser_test.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
@@ skipping 42 matching lines @@
   base::RunLoop().RunUntilIdle();
 
   metrics::CastMetricsHelper::GetInstance()->SetDummySessionIdForTesting();
 
   SetUpOnMainThread();
   RunTestOnMainThread();
   TearDownOnMainThread();
 }
 
 content::WebContents* CastBrowserTest::NavigateToURL(const GURL& url) {
-  window_ = base::MakeUnique<CastContentWindow>();
+  window_ = CastContentWindow::Create(this);
 
   web_contents_ = window_->CreateWebContents(
       CastBrowserProcess::GetInstance()->browser_context());
-  window_->CreateWindowTree(web_contents_.get());
+  window_->ShowWebContents(web_contents_.get());
   content::WaitForLoadStop(web_contents_.get());
 
   content::TestNavigationObserver same_tab_observer(web_contents_.get(), 1);
   content::NavigationController::LoadURLParams params(url);
   params.transition_type = ui::PageTransitionFromInt(
       ui::PAGE_TRANSITION_TYPED | ui::PAGE_TRANSITION_FROM_ADDRESS_BAR);
   web_contents_->GetController().LoadURLWithParams(params);
   same_tab_observer.Wait();
 
   return web_contents_.get();
 }
 
+void CastBrowserTest::OnWindowDestroyed() {}
+
+void CastBrowserTest::OnKeyEvent(const ui::KeyEvent& key_event) {}
+
 }  // namespace shell
 }  // namespace chromecast