Trace through const objects instead of spying on flow graph construction to find closure functions.…

sdk/lib/core/uri.dart

Index: sdk/lib/core/uri.dart
diff --git a/sdk/lib/core/uri.dart b/sdk/lib/core/uri.dart
index 78f42de6bdd52bbf322cd55c9ab71673557bbad9..fed7133e197dec0fa297d385119bdf9a49006b83 100644
--- a/sdk/lib/core/uri.dart
+++ b/sdk/lib/core/uri.dart
@@ -213,9 +213,6 @@ class Uri {
     // query         = *( pchar / "/" / "?" )
     //
     // fragment      = *( pchar / "/" / "?" )
-    bool isRegName(int ch) {
-      return ch < 128 && ((_regNameTable[ch >> 4] & (1 << (ch & 0x0f))) != 0);
-    }
     const int EOI = -1;
 
     String scheme = "";