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

gm/bitmaprect.cpp

 /*
  * Copyright 2011 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 "SkGradientShader.h"
@@ skipping 135 matching lines @@
         canvas->drawBitmapRect(bitmap, srcR, dstR, nullptr, SkCanvas::kStrict_SrcRectConstraint);
     }
 
 private:
     typedef skiagm::GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 static void make_big_bitmap(SkBitmap* bitmap) {
 
-    static const int gXSize = 4096;
-    static const int gYSize = 4096;
-    static const int gBorderWidth = 10;
+    constexpr int gXSize = 4096;
+    constexpr int gYSize = 4096;
+    constexpr int gBorderWidth = 10;
 
     bitmap->allocN32Pixels(gXSize, gYSize);
     for (int y = 0; y < gYSize; ++y) {
         for (int x = 0; x < gXSize; ++x) {
             if (x <= gBorderWidth || x >= gXSize-gBorderWidth ||
                 y <= gBorderWidth || y >= gYSize-gBorderWidth) {
                 *bitmap->getAddr32(x, y) = SkPreMultiplyColor(0x88FFFFFF);
             } else {
                 *bitmap->getAddr32(x, y) = SkPreMultiplyColor(0x88FF0000);
             }
@@ skipping 102 matching lines @@
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new DrawBitmapRect2(false); )
 DEF_GM( return new DrawBitmapRect2(true); )
 DEF_GM( return new DrawBitmapRect3(); )
 
 #ifndef SK_BUILD_FOR_ANDROID
 DEF_GM( return new DrawBitmapRect4(false); )
 DEF_GM( return new DrawBitmapRect4(true); )
 #endif