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

gm/imagesource2.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkImage.h"
 #include "SkImageSource.h"
@@ skipping 13 matching lines @@
     SkString onShortName() override {
         SkString name("imagesrc2_");
         name.append(fSuffix);
         return name;
     }
 
     SkISize onISize() override { return SkISize::Make(256, 256); }
 
     // Create an image with high frequency vertical stripes
     void onOnceBeforeDraw() override {
-        static const SkPMColor gColors[] = {
+        constexpr SkPMColor gColors[] = {
             SK_ColorRED,     SK_ColorGRAY,
             SK_ColorGREEN,   SK_ColorGRAY,
             SK_ColorBLUE,    SK_ColorGRAY,
             SK_ColorCYAN,    SK_ColorGRAY,
             SK_ColorMAGENTA, SK_ColorGRAY,
             SK_ColorYELLOW,  SK_ColorGRAY,
             SK_ColorWHITE,   SK_ColorGRAY,
         };
 
         auto surface(SkSurface::MakeRasterN32Premul(kImageSize, kImageSize));
@@ skipping 21 matching lines @@
         const SkRect dstRect = SkRect::MakeLTRB(0.75f, 0.75f, 225.75f, 225.75f);
 
         SkPaint p;
         p.setImageFilter(SkImageSource::Make(fImage, srcRect, dstRect, fFilter));
 
         canvas->saveLayer(nullptr, &p);
         canvas->restore();
     }
 
 private:
-    static const int kImageSize = 503;
+    static constexpr int kImageSize = 503;
 
     SkString fSuffix;
     SkFilterQuality fFilter;
     sk_sp<SkImage>  fImage;
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new ImageSourceGM("none", kNone_SkFilterQuality);)
 DEF_GM(return new ImageSourceGM("low", kLow_SkFilterQuality);)
 DEF_GM(return new ImageSourceGM("med", kMedium_SkFilterQuality);)
 DEF_GM(return new ImageSourceGM("high", kHigh_SkFilterQuality);)
 }