[Chromecast] Handle device scale factor correctly

chromecast/browser/cast_content_window.h

 // 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.
 
 #ifndef CHROMECAST_BROWSER_CAST_CONTENT_WINDOW_H_
 #define CHROMECAST_BROWSER_CAST_CONTENT_WINDOW_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 19 matching lines @@
  public:
   CastContentWindow();
 
   // Removes the window from the screen.
   ~CastContentWindow() override;
 
   // Sets the window's background to be transparent (call before
   // CreateWindowTree).
   void SetTransparent() { transparent_ = true; }
 
-  // Create a window with the given size for |web_contents|.
-  void CreateWindowTree(const gfx::Size& initial_size,
-                        content::WebContents* web_contents);
+  // Create a full-screen window for |web_contents|.
+  void CreateWindowTree(content::WebContents* web_contents);
 
   std::unique_ptr<content::WebContents> CreateWebContents(
-      const gfx::Size& initial_size,
       content::BrowserContext* browser_context);
 
   // content::WebContentsObserver implementation:
   void DidFirstVisuallyNonEmptyPaint() override;
   void MediaStoppedPlaying(const MediaPlayerId& id) override;
   void MediaStartedPlaying(const MediaPlayerId& id) override;
   void RenderViewCreated(content::RenderViewHost* render_view_host) override;
 
  private:
 #if defined(USE_AURA)
   std::unique_ptr<aura::WindowTreeHost> window_tree_host_;
 #endif
   bool transparent_;
 
   DISALLOW_COPY_AND_ASSIGN(CastContentWindow);
 };
 
 }  // namespace shell
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_CAST_CONTENT_WINDOW_H_