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

gm/lightingshader.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 "SkLightingShader.h"
 #include "SkNormalSource.h"
@@ skipping 48 matching lines @@
 
 protected:
     enum NormalMap {
         kHemi_NormalMap,
         kFrustum_NormalMap,
         kTetra_NormalMap,
 
         kLast_NormalMap = kTetra_NormalMap
     };
 
-    static const int kNormalMapCount = kLast_NormalMap+1;
+    static constexpr int kNormalMapCount = kLast_NormalMap+1;
 
     SkString onShortName() override {
         return SkString("lightingshader");
     }
 
     SkISize onISize() override {
         return SkISize::Make(kGMSize, kGMSize);
     }
 
     void onOnceBeforeDraw() override {
@@ skipping 77 matching lines @@
             canvas->save();
             m.setRotate(45.0f, r.centerX(), r.centerY());
             m.postTranslate(0.0f, -kGMSize/2.0f + kTexSize/2.0f);
             canvas->setMatrix(m);
             this->drawRect(canvas, r, kHemi_NormalMap);
             canvas->restore();
         }
     }
 
 private:
-    static const int kTexSize = 128;
-    static const int kGMSize  = 512;
+    static constexpr int kTexSize = 128;
+    static constexpr int kGMSize  = 512;
 
     SkBitmap        fDiffuse;
     SkBitmap        fNormalMaps[kNormalMapCount];
 
     sk_sp<SkLights> fLights;
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new LightingShaderGM;)
 }