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

include/gpu/GrContext.h

Index: include/gpu/GrContext.h
diff --git a/include/gpu/GrContext.h b/include/gpu/GrContext.h
index cb407aa5bfa16db1d2c3e7800e0c2c237e7b2804..62ad39db7aaf5ac32169f6f9dbf1a624ca12998f 100644
--- a/include/gpu/GrContext.h
+++ b/include/gpu/GrContext.h
@@ -298,8 +298,16 @@ public:
                             uint32_t pixelOpsFlags = 0);
 
     /**
+     * Copies contents of src to dst, while applying a gamma curve. Fails if the two surfaces
+     * are not identically sized.
+     * @param dst           the surface to copy to.
+     * @param src           the texture to copy from.
+     * @param gamma         the desired gamma value of the encoded data.
+     */
+    bool applyGamma(GrRenderTarget* dst, GrTexture* src, SkScalar gamma);
+
+    /**
      * Copies a rectangle of texels from src to dst.
-     * bounds.
      * @param dst           the surface to copy to.
      * @param src           the surface to copy from.
      * @param srcRect       the rectangle of the src that should be copied.