Remove SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS flag.

Neither Chrome nor Android uses this flag anymore.
Make sure all constructors touched that only have one parameter are marked as 'explicit'.

BUG=2187
R=scroggo@google.com, reed@google.com

Author: dominikg@chromium.org

Review URL: https://codereview.chromium.org/282203004

git-svn-id: http://skia.googlecode.com/svn/trunk@14749 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/effects/SkCornerPathEffect.h b/include/effects/SkCornerPathEffect.h
index c77505b..8bb7a50 100644
--- a/include/effects/SkCornerPathEffect.h
+++ b/include/effects/SkCornerPathEffect.h
@@ -31,14 +31,10 @@
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkCornerPathEffect)
 
 protected:
-    SkCornerPathEffect(SkReadBuffer&);
+    explicit SkCornerPathEffect(SkScalar radius);
+    explicit SkCornerPathEffect(SkReadBuffer&);
     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
 
-#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
-public:
-#endif
-    SkCornerPathEffect(SkScalar radius);
-
 private:
     SkScalar    fRadius;