[builtins] Migrate Number constructor similar to String constructor.

test/mjsunit/stack-traces-2.js

Index: test/mjsunit/stack-traces-2.js
diff --git a/test/mjsunit/stack-traces-2.js b/test/mjsunit/stack-traces-2.js
index 0e001aa56a8b0c4fc41102a047b6c61fae521074..45dfe3a1ea4943653e03a1b6c4ab24398bf897a3 100644
--- a/test/mjsunit/stack-traces-2.js
+++ b/test/mjsunit/stack-traces-2.js
@@ -69,11 +69,9 @@ function testNotOmittedBuiltin(throwing, included) {
 
 
 testTraceNativeConversion(String);  // Does ToString on argument.
-testTraceNativeConversion(Number);  // Does ToNumber on argument.
 testTraceNativeConversion(RegExp);  // Does ToString on argument.
 
 testTraceNativeConstructor(String);  // Does ToString on argument.
-testTraceNativeConstructor(Number);  // Does ToNumber on argument.
 testTraceNativeConstructor(RegExp);  // Does ToString on argument.
 
 // QuickSort has builtins object as receiver, and is non-native