Revert of Fix SkTwoPointConicalGradient zero-radius handling (patchset #2 id:20001 of https://codereview.chromium.org/1756573002/ )

Reason for revert:
One layout test shows a regression: https://storage.googleapis.com/chromium-layout-test-archives/linux_blink_rel/83359/layout-test-results/fast/gradients/crash-on-zero-radius-diffs.html

Original issue's description:
> Fix SkTwoPointConicalGradient zero-radius handling
>
> r == 0 is within valid gradient range, we shouldn't skip it.
>
> BUG=skia:5023
> R=caryclark@google.com,reed@google.com
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1756573002
>
> Committed: https://skia.googlesource.com/skia/+/9c0b02a557e9be663a0eb07519e1b6a61a6c3df2

TBR=caryclark@google.com,reed@google.com,fmalita@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:5023

Review URL: https://codereview.chromium.org/1754113003

1 files changed, 2 insertions, 2 deletions

diff --git a/src/effects/gradients/SkTwoPointConicalGradient.cpp b/src/effects/gradients/SkTwoPointConicalGradient.cpp
index 2209306fe3..b938ebdec7 100644
--- a/src/effects/gradients/SkTwoPointConicalGradient.cpp
+++ b/src/effects/gradients/SkTwoPointConicalGradient.cpp
@@ -122,10 +122,10 @@ SkFixed TwoPtRadialContext::nextT() {
     // find_quad_roots returns the values sorted, so we start with the last
     float t = roots[countRoots - 1];
     float r = lerp(fRec.fRadius, fRec.fDRadius, t);
-    if (r < 0) {
+    if (r <= 0) {
         t = roots[0];   // might be the same as roots[countRoots-1]
         r = lerp(fRec.fRadius, fRec.fDRadius, t);
-        if (r < 0) {
+        if (r <= 0) {
             return TwoPtRadial::kDontDrawT;
         }
     }