Bug 1347224 - Part 2: Re-add Gecko_Truncate[C]String temporarially to avoid stylo breakage, r=froydnj

MozReview-Commit-ID: 1EhKt434D3k

xpcom/string/nsSubstring.cpp

@@ -425,4 +425,18 @@ bool Gecko_FallibleSetLengthString(nsAString* aThis, uint32_t aLength)
   return aThis->SetLength(aLength, mozilla::fallible);
 }
 
+// NOTE: These two methods, Gecko_TruncateString and Gecko_TruncateCString are
+// not used by the nsstring bindings, but until the version in servo
+// (nsstring_vendor) is udpated, they still need to be included in the binary to
+// not break the tree. These will be removed in bug 1348398.
+void Gecko_TruncateString(nsAString* aThis)
+{
+  aThis->Truncate();
+}
+
+void Gecko_TruncateCString(nsACString* aThis)
+{
+  aThis->Truncate();
+}
+
 } // extern "C"