Reland "Keep a canonical list of shared function infos."

src/typing.cc

Index: src/typing.cc
diff --git a/src/typing.cc b/src/typing.cc
index 0d8ed525a18a3c6ceff0639a9a0bffcd596e7e9d..6f5cd1c6e0337b0ccaea2c07e67732c83e1eb678 100644
--- a/src/typing.cc
+++ b/src/typing.cc
@@ -346,9 +346,7 @@ void AstTyper::VisitDebuggerStatement(DebuggerStatement* stmt) {
 }
 
 
-void AstTyper::VisitFunctionLiteral(FunctionLiteral* expr) {
-  expr->InitializeSharedInfo(Handle<Code>(info_->closure()->shared()->code()));
-}
+void AstTyper::VisitFunctionLiteral(FunctionLiteral* expr) {}
 
 
 void AstTyper::VisitClassLiteral(ClassLiteral* expr) {}