[turbofan] Drop broken StaticParameterTraits.

src/compiler/js-graph.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_JS_GRAPH_H_
 #define V8_COMPILER_JS_GRAPH_H_
 
 #include "src/compiler/common-node-cache.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
@@ skipping 28 matching lines @@
   Node* TheHoleConstant();
   Node* TrueConstant();
   Node* FalseConstant();
   Node* NullConstant();
   Node* ZeroConstant();
   Node* OneConstant();
   Node* NaNConstant();
 
   // Creates a HeapConstant node, possibly canonicalized, without inspecting the
   // object.
-  Node* HeapConstant(Unique<Object> value);
+  Node* HeapConstant(Unique<HeapObject> value);
 
   // Creates a HeapConstant node, possibly canonicalized, and may access the
   // heap to inspect the object.
-  Node* HeapConstant(Handle<Object> value);
+  Node* HeapConstant(Handle<HeapObject> value);
 
   // Creates a Constant node of the appropriate type for the given object.
   // Accesses the heap to inspect the object and determine whether one of the
   // canonicalized globals or a number constant should be returned.
   Node* Constant(Handle<Object> value);
 
   // Creates a NumberConstant node, usually canonicalized.
   Node* Constant(double value);
 
   // Creates a NumberConstant node, usually canonicalized.
@@ skipping 38 matching lines @@
   SetOncePointer<Node> the_hole_constant_;
   SetOncePointer<Node> true_constant_;
   SetOncePointer<Node> false_constant_;
   SetOncePointer<Node> null_constant_;
   SetOncePointer<Node> zero_constant_;
   SetOncePointer<Node> one_constant_;
   SetOncePointer<Node> nan_constant_;
 
   CommonNodeCache cache_;
 
-  Node* ImmovableHeapConstant(Handle<Object> value);
+  Node* ImmovableHeapConstant(Handle<HeapObject> value);
   Node* NumberConstant(double value);
   Node* NewNode(const Operator* op);
 
   Factory* factory() { return isolate()->factory(); }
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif