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

gm/convexpolyeffect.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // This test only works with the GPU backend.
 
 #include "gm.h"
@@ skipping 92 matching lines @@
         tri.lineTo(100.f, 20.f);
         tri.lineTo(15.f, 100.f);
 
         fPaths.addToTail(tri);
         fPaths.addToTail(SkPath())->reverseAddPath(tri);
 
         tri.close();
         fPaths.addToTail(tri);
 
         SkPath ngon;
-        static const SkScalar kRadius = 50.f;
+        constexpr SkScalar kRadius = 50.f;
         const SkPoint center = { kRadius, kRadius };
         for (int i = 0; i < GrConvexPolyEffect::kMaxEdges; ++i) {
             SkScalar angle = 2 * SK_ScalarPI * i / GrConvexPolyEffect::kMaxEdges;
             SkPoint point;
             point.fY = SkScalarSinCos(angle, &point.fX);
             point.scale(kRadius);
             point = center + point;
             if (0 == i) {
                 ngon.moveTo(point);
             } else {
@@ skipping 29 matching lines @@
     }
 
     void onDraw(SkCanvas* canvas) override {
         GrDrawContext* drawContext = canvas->internal_private_accessTopLayerDrawContext();
         if (!drawContext) {
             skiagm::GM::DrawGpuOnlyMessage(canvas);
             return;
         }
 
         SkScalar y = 0;
-        static const SkScalar kDX = 12.f;
+        constexpr SkScalar kDX = 12.f;
         for (PathList::Iter iter(fPaths, PathList::Iter::kHead_IterStart);
              iter.get();
              iter.next()) {
             const SkPath* path = iter.get();
             SkScalar x = 0;
 
             for (int et = 0; et < kGrProcessorEdgeTypeCnt; ++et) {
                 const SkMatrix m = SkMatrix::MakeTrans(x, y);
                 SkPath p;
                 path->transform(m, &p);
@@ skipping 74 matching lines @@
     PathList fPaths;
     RectList fRects;
 
     typedef GM INHERITED;
 };
 
 DEF_GM(return new ConvexPolyEffect;)
 }
 
 #endif