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

tools/VisualBench/VisualBench.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  */
 
 #include "VisualBench.h"
 
@@ skipping 88 matching lines @@
     return true;
 }
 
 void VisualBench::resetContext() {
     this->tearDownContext();
     this->setupContext();
 }
 
 void VisualBench::setupContext() {
     int screenSamples = FLAGS_offscreen ? 0 : FLAGS_msaa;
-    if (!this->attach(kNativeGL_BackEndType, screenSamples, &fAttachmentInfo)) {
+    if (!this->attach(kNativeGL_BackEndType, screenSamples, false, &fAttachmentInfo)) {
         SkDebugf("Not possible to create backend.\n");
         INHERITED::release();
         SkFAIL("Could not create backend\n");
     }
 
     this->setVsync(false);
 
     fSurface.reset(nullptr);
 
     fInterface.reset(GrGLCreateNativeInterface());
@@ skipping 65 matching lines @@
     SkEvent::Init();
 }
 
 void application_term() {
     SkEvent::Term();
 }
 
 SkOSWindow* create_sk_window(void* hwnd, int argc, char** argv) {
     return new VisualBench(hwnd, argc, argv);
 }