[turbofan] Eliminate some broker arguments

If we assume that kMaxHintsSize is at least 1, we can reduce the
clutter of broker arguments somewhat.

Bug: v8:7790
Change-Id: I6c6607f694e420ef50a07202d0c98cbff7471af9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2011084
Auto-Submit: Georg Neis <neis@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65880}

src/compiler/serializer-hints.h

@@ -130,9 +130,8 @@ class JSHeapBroker;
 class Hints {
  public:
   Hints() = default;  // Empty.
-  static Hints SingleConstant(Handle<Object> constant, Zone* zone,
-                              JSHeapBroker* broker);
-  static Hints SingleMap(Handle<Map> map, Zone* zone, JSHeapBroker* broker);
+  static Hints SingleConstant(Handle<Object> constant, Zone* zone);
+  static Hints SingleMap(Handle<Map> map, Zone* zone);
 
   // For inspection only.
   ConstantsSet constants() const;
@@ -188,6 +187,7 @@ class Hints {
   bool Union(Hints const& other);
 
   static const size_t kMaxHintsSize = 50;
+  static_assert(kMaxHintsSize >= 1, "must allow for at least one hint");
 };
 
 using HintsVector = ZoneVector<Hints>;