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

gm/textblobmixedsizes.cpp

Index: gm/textblobmixedsizes.cpp
diff --git a/gm/textblobmixedsizes.cpp b/gm/textblobmixedsizes.cpp
index 4e3f0eaeb58f4c6d11e2aa7fd8e949276f5d4e47..6ce0eafe629d44f26758954314303fdfc075c5ca 100644
--- a/gm/textblobmixedsizes.cpp
+++ b/gm/textblobmixedsizes.cpp
@@ -118,8 +118,8 @@ protected:
 
         SkRect bounds = fBlob->bounds();
 
-        static const int kPadX = SkScalarFloorToInt(bounds.width() / 3);
-        static const int kPadY = SkScalarFloorToInt(bounds.height() / 3);
+        const int kPadX = SkScalarFloorToInt(bounds.width() / 3);
+        const int kPadY = SkScalarFloorToInt(bounds.height() / 3);
 
         int rowCount = 0;
         canvas->translate(SkIntToScalar(kPadX), SkIntToScalar(kPadY));
@@ -132,13 +132,13 @@ protected:
         }
         paint.setAntiAlias(false);
 
-        static const SkScalar kSigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(8));
+        const SkScalar kSigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(8));
 
         // setup blur paint
         SkPaint blurPaint(paint);
         blurPaint.setColor(sk_tool_utils::color_to_565(SK_ColorBLACK));
         blurPaint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle, kSigma));
-        
+
         for (int i = 0; i < 4; i++) {
             canvas->save();
             switch (i % 2) {
@@ -179,8 +179,8 @@ protected:
 private:
     SkAutoTUnref<const SkTextBlob> fBlob;
 
-    static const int kWidth = 2100;
-    static const int kHeight = 1900;
+    static constexpr int kWidth = 2100;
+    static constexpr int kHeight = 1900;
 
     bool fUseDFT;