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

gm/glyph_pos.cpp

 /*
  * Copyright 2014 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 "SkCanvas.h"
 #include "SkTypeface.h"
 
 /* This test tries to define the effect of using hairline strokes on text.
  * Provides non-hairline images for reference and consistency checks.
  * glyph_pos_(h/n)_(s/f/b)
  *   -> test hairline/non-hairline stroke/fill/stroke+fill.
  */
-static const SkScalar kTextHeight = 14.0f;
-static const char kText[] = "Proportional Hamburgefons #% fi";
+constexpr SkScalar kTextHeight = 14.0f;
+constexpr char kText[] = "Proportional Hamburgefons #% fi";
 
 static void drawTestCase(SkCanvas* canvas,
                          SkScalar textScale,
                          SkScalar strokeWidth,
                          SkPaint::Style strokeStyle);
 
 static void draw_gm(SkCanvas* canvas,
                     SkScalar strokeWidth,
                     SkPaint::Style strokeStyle) {
         // There's a black pixel at 40, 40 for reference.
@@ skipping 114 matching lines @@
 }
 DEF_SIMPLE_GM(glyph_pos_n_s, c, 800, 600) {
     draw_gm(c, 1.2f, SkPaint::kStroke_Style);
 }
 DEF_SIMPLE_GM(glyph_pos_h_f, c, 800, 600) {
     draw_gm(c, 0.0f, SkPaint::kFill_Style);
 }
 DEF_SIMPLE_GM(glyph_pos_n_f, c, 800, 600) {
     draw_gm(c, 1.2f, SkPaint::kFill_Style);
 }