[turbofan] Reuse the operation typer's logic in the typer.

src/compiler/typer.h

Index: src/compiler/typer.h
diff --git a/src/compiler/typer.h b/src/compiler/typer.h
index 0982b28ade8c562d51646406ffdbc9407daedd07..5cfc8e07377973042cc699bb5cd8def469abf501 100644
--- a/src/compiler/typer.h
+++ b/src/compiler/typer.h
@@ -18,6 +18,7 @@ class TypeCache;
 
 namespace compiler {
 
+class OperationTyper;
 
 class Typer {
  public:
@@ -47,6 +48,7 @@ class Typer {
   Flags flags() const { return flags_; }
   CompilationDependencies* dependencies() const { return dependencies_; }
   FunctionType* function_type() const { return function_type_; }
+  OperationTyper* operation_typer() const { return operation_typer_; }
 
   Isolate* const isolate_;
   Graph* const graph_;
@@ -55,6 +57,7 @@ class Typer {
   FunctionType* function_type_;
   Decorator* decorator_;
   TypeCache const& cache_;
+  OperationTyper* operation_typer_;
 
   Type* singleton_false_;
   Type* singleton_true_;