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

src/views/sdl/SkOSWindow_SDL.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkOSWindow_SDL.h"
 #include "SkCanvas.h"
 
 #if defined(SK_BUILD_FOR_ANDROID)
@@ skipping 39 matching lines @@
     return nullptr;
 }
 
 void SkOSWindow::release() {
     if (fGLContext) {
         SDL_GL_DeleteContext(fGLContext);
         fGLContext = nullptr;
     }
 }
 
-bool SkOSWindow::attach(SkBackEndTypes attachType, int msaaSampleCount, AttachmentInfo* info) {
+bool SkOSWindow::attach(SkBackEndTypes attachType, int msaaSampleCount, bool deepColor,
+                        AttachmentInfo* info) {
     this->createWindow(msaaSampleCount);
     if (!fWindow) {
         return false;
     }
     if (!fGLContext) {
         fGLContext = SDL_GL_CreateContext(fWindow);
         if (!fGLContext) {
             report_sdl_error("Failed to create SDL GL context.");
             return false;
         }
@@ skipping 320 matching lines @@
 
     SkOSWindow::RunEventLoop();
 
     delete window;
     application_term();
 
     SDL_Quit();
 
     return 0;
 }