Remove dependency on v8.h from TurboFan.

src/compiler/diamond.h

 // Copyright 2013 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_DIAMOND_H_
 #define V8_COMPILER_DIAMOND_H_
 
-#include "src/v8.h"
-
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/node.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // A helper to make it easier to build diamond-shaped control patterns.
 struct Diamond {
@@ skipping 56 matching lines @@
     node->ReplaceInput(1, fe);
     node->ReplaceInput(2, merge);
     node->TrimInputCount(3);
   }
 };
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_DIAMOND_H_