Move StringMatch to String::IndexOf

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 82155dafc2820a8d5f9827f1351ebf4de998f727..2a202c878c186b3d88234056ad4e897d03727125 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -9027,6 +9027,12 @@ class String: public Name {
   MUST_USE_RESULT static ComparisonResult Compare(Handle<String> x,
                                                   Handle<String> y);
 
+  // Perform string match of pattern on subject, starting at start index.
+  // Caller must ensure that 0 <= start_index <= sub->length(),
+  // and should check that pat->length() + start_index <= sub->length().

[Yang, 2016/07/22 08:34:03]

looks like this second requirement is not necessary. We check for that and
return -1.

[jgruber, 2016/07/22 09:22:30]

Done.

+  static int IndexOf(Isolate* isolate, Handle<String> sub, Handle<String> pat,
+                     int start_index);
+
   // String equality operations.
   inline bool Equals(String* other);
   inline static bool Equals(Handle<String> one, Handle<String> two);