GM: replace boilerplate with macros

gm/skbug1719.cpp

Index: gm/skbug1719.cpp
diff --git a/gm/skbug1719.cpp b/gm/skbug1719.cpp
index 0a75d353f4ef07eaea2528a8bbc993e73b1ee7a6..23c0c5fec06f7ba897863efeb185363025262cd6 100644
--- a/gm/skbug1719.cpp
+++ b/gm/skbug1719.cpp
@@ -10,8 +10,6 @@
 #include "SkColorFilter.h"
 #include "SkPath.h"
 
-namespace skiagm {
-
 /**
  * This test exercises bug 1719. An anti-aliased blurred path is rendered through a soft clip. On
  * the GPU a scratch texture was used to hold the original path mask as well as the blurred path
@@ -20,26 +18,8 @@ namespace skiagm {
  *
  * The correct image should look like a thin stroked round rect.
  */
-class SkBug1719GM : public GM {
-public:
-    SkBug1719GM() {}
-
-protected:
-    SkString onShortName() override {
-        return SkString("skbug1719");
-    }
-
-    SkISize onISize() override {
-        return SkISize::Make(300, 100);
-    }
-
-    void onDrawBackground(SkCanvas* canvas) override {
-        SkPaint bgPaint;
-        bgPaint.setColor(sk_tool_utils::color_to_565(0xFF303030));
-        canvas->drawPaint(bgPaint);
-    }
-
-    void onDraw(SkCanvas* canvas) override {
+DEF_SIMPLE_GM_BG(skbug1719, canvas, 300, 100,
+                 sk_tool_utils::color_to_565(0xFF303030)) {
         canvas->translate(SkIntToScalar(-800), SkIntToScalar(-650));
 
         // The data is lifted from an SKP that exhibited the bug.
@@ -89,15 +69,4 @@ protected:
 
         canvas->clipPath(clipPath, SkRegion::kIntersect_Op, true);
         canvas->drawPath(drawPath, paint);
-    }
-
-private:
-
-    typedef GM INHERITED;
-};
-
-//////////////////////////////////////////////////////////////////////////////
-
-DEF_GM(return new SkBug1719GM;)
-
 }