Add time return argument to SkCurveMeasure's getPosTan, rename to getPosTanTime

src/utils/SkCurveMeasure.cpp

Index: src/utils/SkCurveMeasure.cpp
diff --git a/src/utils/SkCurveMeasure.cpp b/src/utils/SkCurveMeasure.cpp
index 785bca7cfd15f5c118348249be2f1e0f879c3ea6..fc2aa84faa119558d5dce1c30f6bdd826c3eb890 100644
--- a/src/utils/SkCurveMeasure.cpp
+++ b/src/utils/SkCurveMeasure.cpp
@@ -234,10 +234,13 @@ SkScalar SkCurveMeasure::getTime(SkScalar targetLength) {
     return currentT;
 }
 
-void SkCurveMeasure::getPosTan(SkScalar targetLength, SkPoint* pos,
-                               SkVector* tan) {
+void SkCurveMeasure::getPosTanTime(SkScalar targetLength, SkPoint* pos,
+                               SkVector* tan, SkScalar* time) {
     SkScalar t = getTime(targetLength);
 
+    if (time) {
+        *time = t;
+    }
     if (pos) {
         // TODO(hstern) switch here on curve type.
         *pos = evaluateQuad(t);