[turbofan] Make js-typed-lowering.h self contained.

src/compiler/js-typed-lowering.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_TYPED_LOWERING_H_
 #define V8_COMPILER_JS_TYPED_LOWERING_H_
 
 #include "src/compiler/graph-reducer.h"
+#include "src/compiler/opcodes.h"
 #include "src/compiler/simplified-operator.h"
 
 namespace v8 {
 namespace internal {
+
+// Forward declarations.
+class Factory;
+
+
 namespace compiler {
 
 // Forward declarations.
 class CommonOperatorBuilder;
 class JSGraph;
 class JSOperatorBuilder;
 class MachineOperatorBuilder;
 
 
 // Lowers JS-level operators to simplified operators based on types.
@@ skipping 52 matching lines @@
   Type* one_range_;
   Type* zero_thirtyone_range_;
   Type* shifted_int32_ranges_[4];
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_TYPED_LOWERING_H_