Remove more views code, just to simplify things

Bug: skia:
Change-Id: Ie31a3c764e4f88f2b08f4198bd253841a2d8c264
Reviewed-on: https://skia-review.googlesource.com/79100
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
diff --git a/samplecode/SampleXfer.cpp b/samplecode/SampleXfer.cpp
index 074613c..d459274 100644
--- a/samplecode/SampleXfer.cpp
+++ b/samplecode/SampleXfer.cpp
@@ -14,6 +14,7 @@
 #include "SkPath.h"
 #include "SkRandom.h"
 #include "SkRSXform.h"
+#include "SkString.h"
 #include "SkSurface.h"
 #include "SkGradientShader.h"