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

gm/textblobgeometrychange.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 
 #include "SkCanvas.h"
@@ skipping 47 matching lines @@
         canvas->drawTextBlob(blob.get(), 10, 50, paint);
 
         // This should not look garbled since we should disable LCD text in this case
         // (i.e., unknown pixel geometry)
         c->clear(0x00ffffff);
         c->drawTextBlob(blob.get(), 10, 150, paint);
         surface->draw(canvas, 0, 0, nullptr);
     }
 
 private:
-    static const int kWidth = 200;
-    static const int kHeight = 200;
+    static constexpr int kWidth = 200;
+    static constexpr int kHeight = 200;
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new TextBlobGeometryChange;)
 }