Replace a lot of 'static const' with 'constexpr' or 'const'.

gm/dstreadshuffle.cpp

Index: gm/dstreadshuffle.cpp
diff --git a/gm/dstreadshuffle.cpp b/gm/dstreadshuffle.cpp
index 4f0f071b0a8e6d59d6f16e5c7ce1cd24dd664f19..47c70563b5388f23956f53258e8689d29f791b0e 100644
--- a/gm/dstreadshuffle.cpp
+++ b/gm/dstreadshuffle.cpp
@@ -44,8 +44,8 @@ protected:
     void drawShape(SkCanvas* canvas,
                    SkPaint* paint,
                    ShapeType type) {
-        static const SkRect kRect = SkRect::MakeXYWH(SkIntToScalar(-50), SkIntToScalar(-50),
-                                                     SkIntToScalar(75), SkIntToScalar(105));
+        const SkRect kRect = SkRect::MakeXYWH(SkIntToScalar(-50), SkIntToScalar(-50),
+                                              SkIntToScalar(75), SkIntToScalar(105));
         switch (type) {
             case kCircle_ShapeType:
                 canvas->drawCircle(0, 0, 50, *paint);
@@ -183,8 +183,8 @@ private:
     SkAutoTUnref<SkShader> fBG;
     SkPath                 fConcavePath;
     SkPath                 fConvexPath;
-    static const int kWidth = 900;
-    static const int kHeight = 400;
+    static constexpr int kWidth = 900;
+    static constexpr int kHeight = 400;
     typedef GM INHERITED;
 };