cull edges that are to the right of the clip

BUG=skia:

Review URL: https://codereview.chromium.org/913503002
diff --git a/tests/ClipperTest.cpp b/tests/ClipperTest.cpp
index 00b6229..8ebd9b4 100644
--- a/tests/ClipperTest.cpp
+++ b/tests/ClipperTest.cpp
@@ -48,7 +48,7 @@
 }
 
 static void test_edgeclipper() {
-    SkEdgeClipper clipper;
+    SkEdgeClipper clipper(false);
 
     const SkPoint pts[] = {
         { 3.0995476e+010f,  42.929779f },