[turbofan] Add Disallow* scopes to type narrowing reducer.

No changes were necessary.

R=jarin@chromium.org

Bug: v8:7790
Change-Id: I8a5c308b9534ee1fb669a901b6626c338883fbf8
Reviewed-on: https://chromium-review.googlesource.com/1128741Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54315}

src/compiler/type-narrowing-reducer.cc

@@ -20,6 +20,11 @@ TypeNarrowingReducer::TypeNarrowingReducer(Editor* editor, JSGraph* jsgraph,
 TypeNarrowingReducer::~TypeNarrowingReducer() {}
 
 Reduction TypeNarrowingReducer::Reduce(Node* node) {
+  DisallowHeapAllocation no_heap_allocation;
+  DisallowHandleAllocation no_handle_allocation;
+  DisallowHandleDereference no_handle_dereference;
+  DisallowCodeDependencyChange no_dependency_change;
+
   Type new_type = Type::Any();
 
   switch (node->opcode()) {