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

experimental/SkV8Example/SkV8Example.cpp

Index: experimental/SkV8Example/SkV8Example.cpp
diff --git a/experimental/SkV8Example/SkV8Example.cpp b/experimental/SkV8Example/SkV8Example.cpp
index fe205d740ded361a18227740dec5a7625d7bcb0c..bb448bad15174d5aa8bffdf3377c760219ad707e 100644
--- a/experimental/SkV8Example/SkV8Example.cpp
+++ b/experimental/SkV8Example/SkV8Example.cpp
@@ -74,7 +74,7 @@ void SkV8ExampleWindow::windowSizeChanged() {
     if (FLAGS_gpu) {
         SkOSWindow::AttachmentInfo attachmentInfo;
         bool result = this->attach(
-                SkOSWindow::kNativeGL_BackEndType, 0, &attachmentInfo);
+                SkOSWindow::kNativeGL_BackEndType, 0, false, &attachmentInfo);
         if (!result) {
             printf("Failed to attach.");
             exit(1);