Remove Expression::bounds_, in order to conserve memory during parsing.

test/cctest/test-asm-validator.cc

Index: test/cctest/test-asm-validator.cc
diff --git a/test/cctest/test-asm-validator.cc b/test/cctest/test-asm-validator.cc
index c0e20a1e636e221936196d63ad83c395c1d25b1d..3902c9f06fe1b109248b86c1608aa6abf0b76207 100644
--- a/test/cctest/test-asm-validator.cc
+++ b/test/cctest/test-asm-validator.cc
@@ -72,7 +72,7 @@ std::string Validate(Zone* zone, const char* source,
       info.scope()->declarations()->at(0)->AsFunctionDeclaration()->fun();
   AsmTyper typer(isolate, zone, *script, root);
   if (typer.Validate()) {
-    ExpressionTypeCollector(isolate, root, types).Run();
+    ExpressionTypeCollector(isolate, root, typer.bounds(), types).Run();
     return "";
   } else {
     return typer.error_message();