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

experimental/iOSSampleApp/SkSampleUIView.mm

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #import "SkSampleUIView.h"
 
 //#define SKGL_CONFIG         kEAGLColorFormatRGB565
@@ skipping 29 matching lines @@
     }
     
     virtual ~SkiOSDeviceManager() {
 #if SK_SUPPORT_GPU
         SkSafeUnref(fCurContext);
         SkSafeUnref(fCurIntf);
         SkSafeUnref(fCurRenderTarget);
 #endif
     }
     
-    void setUpBackend(SampleWindow* win, int msaaSampleCount) override {
+    void setUpBackend(SampleWindow* win, int msaaSampleCount, bool tenBitColor) override {
         SkASSERT(SkOSWindow::kNone_BackEndType == fBackend);
         
         fBackend = SkOSWindow::kNone_BackEndType;
         
 #if SK_SUPPORT_GPU
         switch (win->getDeviceType()) {
             case SampleWindow::kRaster_DeviceType:
                 break;
             // these guys use the native backend
             case SampleWindow::kGPU_DeviceType:
@@ skipping 420 matching lines @@
     glBindRenderbuffer(GL_RENDERBUFFER, fGL.fRenderbuffer);
     glGetRenderbufferParameteriv(GL_RENDERBUFFER,
                                  GL_RENDERBUFFER_STENCIL_SIZE,
                                  &info->fStencilBits);
     glGetRenderbufferParameteriv(GL_RENDERBUFFER,
                                  GL_RENDERBUFFER_SAMPLES_APPLE,
                                  &info->fSampleCount);
 }
 
 @end