fix battlefield website by disallowing very small coordinates

also add and remove comments to document other attempts to fix this that had drawbacks

R=fmalita@chromium.org
BUG=414409

Author: caryclark@google.com

Review URL: https://codereview.chromium.org/575553003
diff --git a/src/pathops/SkPathOpsLine.cpp b/src/pathops/SkPathOpsLine.cpp
index 6229619..e4fc97b 100644
--- a/src/pathops/SkPathOpsLine.cpp
+++ b/src/pathops/SkPathOpsLine.cpp
@@ -89,7 +89,7 @@
     if (unequal) {
         *unequal = (float) largest != (float) (largest + dist);
     }
-    t = SkPinT(t);
+    t = SkPinT(t);  // a looser pin breaks skpwww_lptemp_com_3
     SkASSERT(between(0, t, 1));
     return t;
 }