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

gm/texturedomaineffect.cpp

Index: gm/texturedomaineffect.cpp
diff --git a/gm/texturedomaineffect.cpp b/gm/texturedomaineffect.cpp
index ba574b6b09be798961d5b0660f0c3a716388ba04..2dd340e4252dac9c86f8169f744d271eb3a6b670 100644
--- a/gm/texturedomaineffect.cpp
+++ b/gm/texturedomaineffect.cpp
@@ -138,19 +138,15 @@ protected:
     }
 
 private:
-    static const SkScalar kDrawPad;
-    static const SkScalar kTestPad;
-    static const int      kTargetWidth = 100;
-    static const int      kTargetHeight = 100;
+    static constexpr SkScalar kDrawPad = 10.f;
+    static constexpr SkScalar kTestPad = 10.f;;
+    static constexpr int      kTargetWidth = 100;
+    static constexpr int      kTargetHeight = 100;
     SkBitmap fBmp;
 
     typedef GM INHERITED;
 };
 
-// Windows builds did not like SkScalar initialization in class :(
-const SkScalar TextureDomainEffect::kDrawPad = 10.f;
-const SkScalar TextureDomainEffect::kTestPad = 10.f;
-
 DEF_GM(return new TextureDomainEffect;)
 }