SkPDF: when drawing stroked path, draw using SVG rules for zero-length segments

src/pdf/SkPDFDevice.cpp

Index: src/pdf/SkPDFDevice.cpp
diff --git a/src/pdf/SkPDFDevice.cpp b/src/pdf/SkPDFDevice.cpp
index b6500c1ed426af246a0d22b18b700355fad69655..9134d802ffc6de983c0fe022866aa1a5eedf09f5 100644
--- a/src/pdf/SkPDFDevice.cpp
+++ b/src/pdf/SkPDFDevice.cpp
@@ -1035,7 +1035,12 @@ void SkPDFDevice::drawPath(const SkDraw& d,
     if (!content.entry()) {
         return;
     }
+    bool consumeDegeratePathSegments =
+           paint.getStyle() == SkPaint::kFill_Style ||
+           (paint.getStrokeCap() != SkPaint::kRound_Cap &&
+            paint.getStrokeCap() != SkPaint::kSquare_Cap);
     SkPDFUtils::EmitPath(*pathPtr, paint.getStyle(),
+                         consumeDegeratePathSegments,
                          &content.entry()->fContent);
     SkPDFUtils::PaintPath(paint.getStyle(), pathPtr->getFillType(),
                           &content.entry()->fContent);