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

include/views/SkOSWindow_Win.h

Index: include/views/SkOSWindow_Win.h
diff --git a/include/views/SkOSWindow_Win.h b/include/views/SkOSWindow_Win.h
index eb8b1fc89238325cfeca90940976d5eb34e87cb4..ba9708889bba5e0f07827362ad2dca8567559b60 100644
--- a/include/views/SkOSWindow_Win.h
+++ b/include/views/SkOSWindow_Win.h
@@ -47,7 +47,7 @@ public:
 #endif // SK_SUPPORT_GPU
     };
 
-    bool attach(SkBackEndTypes attachType, int msaaSampleCount, AttachmentInfo*);
+    bool attach(SkBackEndTypes attachType, int msaaSampleCount, bool tenBitColor, AttachmentInfo*);
     void release();
     void present();
 
@@ -127,7 +127,7 @@ private:
 
     void updateSize();
 #if SK_SUPPORT_GPU
-    bool attachGL(int msaaSampleCount, AttachmentInfo* info);
+    bool attachGL(int msaaSampleCount, bool tenBitColor, AttachmentInfo* info);
     void detachGL();
     void presentGL();