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

gm/mixedtextblobs.cpp

 /*
  * Copyright 2013 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 "Resources.h"
@@ skipping 137 matching lines @@
             }
         }
     }
 
 private:
     sk_sp<SkTypeface> fEmojiTypeface;
     sk_sp<SkTypeface> fReallyBigATypeface;
     const char* fEmojiText;
     SkAutoTUnref<const SkTextBlob> fBlob;
 
-    static const int kWidth = 1250;
-    static const int kHeight = 700;
+    static constexpr int kWidth = 1250;
+    static constexpr int kHeight = 700;
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new MixedTextBlobsGM;)
 }