Fixed GM:lightingshader2 size

gm/lightingshader2.cpp

Index: gm/lightingshader2.cpp
diff --git a/gm/lightingshader2.cpp b/gm/lightingshader2.cpp
index c2f4d6caaca04cfd94d4037fd0ed5076e0cb6dc5..9283449e2ccd020c8b4bf4957761591a373f287b 100644
--- a/gm/lightingshader2.cpp
+++ b/gm/lightingshader2.cpp
@@ -38,7 +38,7 @@ protected:
     }
 
     SkISize onISize() override {
-        return SkISize::Make(kGMSize, kGMSize);
+        return SkISize::Make(600, 740);
     }
 
     void onOnceBeforeDraw() override {
@@ -214,7 +214,6 @@ protected:
 
 private:
     static const int kTexSize = 96;
-    static const int kGMSize  = 512;
 
     sk_sp<SkShader> fOpaqueDiffuse;
     sk_sp<SkShader> fTranslucentDiffuse;