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

gm/pathcontourstart.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 "SkDashPathEffect.h"
@@ skipping 72 matching lines @@
             rrect.setOval(rect);
 
             SkPath path;
             path.addRRect(rrect, dir, startIndex);
             return path;
         });
 
     }
 
 private:
-    static const int kImageWidth = 1200;
-    static const int kImageHeight = 600;
+    static constexpr int kImageWidth = 1200;
+    static constexpr int kImageHeight = 600;
 
     SkPaint fDashPaint, fPointsPaint;
     SkRect  fRect;
 
     void drawDirs(SkCanvas* canvas,
                   SkPath (*makePath)(const SkRect&, SkPath::Direction, unsigned)) const {
         drawOneColumn(canvas, SkPath::kCW_Direction, makePath);
         canvas->translate(kImageWidth / 10, 0);
         drawOneColumn(canvas, SkPath::kCCW_Direction, makePath);
         canvas->translate(kImageWidth / 10, 0);
@@ skipping 15 matching lines @@
             canvas->translate(0, kImageHeight / 8);
         }
     }
 
     typedef GM INHERITED;
 };
 
 DEF_GM( return new ContourStartGM(); )
 
 } // namespace skiagm