Remove work from constructors to facilitate debugging.

gm/rrects.cpp

Index: gm/rrects.cpp
diff --git a/gm/rrects.cpp b/gm/rrects.cpp
index fbe7ad183665c7f3277434226114e5e36e6684f6..938d4706dc26e4c3c291e6ed30233a07a9b1965f 100644
--- a/gm/rrects.cpp
+++ b/gm/rrects.cpp
@@ -26,12 +26,15 @@ public:
         kAA_Clip_Type,
         kEffect_Type,
     };
-    RRectGM(Type type) : fType(type) {
+    RRectGM(Type type) : fType(type) { }
+
+protected:
+
+    void onOnceBeforeDraw() override {
         this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
         this->setUpRRects();
     }
 
-protected:
     SkString onShortName() override {
         SkString name("rrect");
         switch (fType) {