Reland of more zero-length changes for svg compatibility (patchset #1 id:1 of https://codereview.chromium.org/1334543002/ )

Reason for revert:
DEPS should be fixed now

Original issue's description:
> Revert of more zero-length changes for svg compatibility (patchset #6 id:100001 of https://codereview.chromium.org/1330623003/ )
>
> Reason for revert:
> breaks DEPS
>
> Original issue's description:
> > more zero-length changes for svg compatibility
> >
> > If a path contains a moveTo followed by a line or curve,
> > even if the line or curve has no length, SVG expects
> > the end caps to draw if the cap style is round or square.
> >
> > Fredrik Söderquist attached a patch to the chrome bug
> > (slightly modified here) that fixes layout test failures
> > resulting from deleting special-case code in SVG
> > dealing with zero-length path segments.
> >
> > R=reed@google.com,fs@opera.com
> > BUG=22974
> >
> > Committed: https://skia.googlesource.com/skia/+/62fb1ba1786863e545c89839b5706ad5151cec15
>
> TBR=fs@opera.com,reed@google.com
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=22974
>
> Committed: https://skia.googlesource.com/skia/+/5ca4fa3846067a47e88d35ace895df3ebe3ec2a5

TBR=fs@opera.com,reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=22974

Review URL: https://codereview.chromium.org/1314833004
diff --git a/gm/strokes.cpp b/gm/strokes.cpp
index 57517a0..e74d35f 100644
--- a/gm/strokes.cpp
+++ b/gm/strokes.cpp
@@ -84,12 +84,16 @@
  */
 class ZeroLenStrokesGM : public skiagm::GM {
     SkPath fMoveHfPath, fMoveZfPath, fDashedfPath, fRefPath[4];
+    SkPath fCubicPath, fQuadPath, fLinePath;
 protected:
     void onOnceBeforeDraw() override {
 
         SkAssertResult(SkParsePath::FromSVGString("M0,0h0M10,0h0M20,0h0", &fMoveHfPath));
         SkAssertResult(SkParsePath::FromSVGString("M0,0zM10,0zM20,0z", &fMoveZfPath));
         SkAssertResult(SkParsePath::FromSVGString("M0,0h25", &fDashedfPath));
+        SkAssertResult(SkParsePath::FromSVGString("M 0 0 C 0 0 0 0 0 0", &fCubicPath));
+        SkAssertResult(SkParsePath::FromSVGString("M 0 0 Q 0 0 0 0", &fQuadPath));
+        SkAssertResult(SkParsePath::FromSVGString("M 0 0 L 0 0", &fLinePath));
 
         for (int i = 0; i < 3; ++i) {
             fRefPath[0].addCircle(i * 10.f, 0, 5);
@@ -140,6 +144,12 @@
             canvas->translate(0, 30);
             fillPaint.setAlpha(127);
             canvas->drawPath(fRefPath[1 + i * 2], fillPaint);
+            canvas->translate(0, 30);
+            canvas->drawPath(fCubicPath, strokePaint);
+            canvas->translate(0, 30);
+            canvas->drawPath(fQuadPath, strokePaint);
+            canvas->translate(0, 30);
+            canvas->drawPath(fLinePath, strokePaint);
             canvas->restore();
         }
     }