Added --deepColor option to SampleApp, triggers creation of a ten-bit/channel buffer on Windows.

include/views/SkOSWindow_SDL.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkOSWindow_SDL_DEFINED
 #define SkOSWindow_SDL_DEFINED
 
@@ skipping 11 matching lines @@
         kNativeGL_BackEndType,
 #if SK_ANGLE
         kANGLE_BackEndType,
 #endif // SK_ANGLE
 #if SK_COMMAND_BUFFER
         kCommandBuffer_BackEndType,
 #endif // SK_COMMAND_BUFFER
     };
 
     void release();
-    bool attach(SkBackEndTypes attachType, int msaaSampleCount, AttachmentInfo*);
+    bool attach(SkBackEndTypes attachType, int msaaSampleCount, bool tenBitColor, AttachmentInfo*);
     void present();
     bool makeFullscreen();
     void setVsync(bool);
     void closeWindow();
     static void RunEventLoop();
 
 protected:
     void onSetTitle(const char title[]) override;
 
 private:
     void createWindow(int msaaSampleCount);
     void destroyWindow();
     void updateWindowTitle();
     static SkOSWindow* GetInstanceForWindowID(Uint32 windowID);
     static bool HasDirtyWindows();
     static void UpdateDirtyWindows();
     static void HandleEvent(const SDL_Event&);
 
     SDL_Window* fWindow;
     SDL_GLContext fGLContext;
     int fWindowMSAASampleCount;
     typedef SkWindow INHERITED;
 };
 
 #endif