[refactor] Separate generated builtins and C++ builtins into separate files

src/builtins/builtins-regexp-gen.h

 // Copyright 2017 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_BUILTINS_BUILTINS_REGEXP_H_
 #define V8_BUILTINS_BUILTINS_REGEXP_H_
 
 #include "src/code-stub-assembler.h"
 
 namespace v8 {
 namespace internal {
 
-typedef compiler::Node Node;
-typedef compiler::CodeAssemblerState CodeAssemblerState;
-typedef compiler::CodeAssemblerLabel CodeAssemblerLabel;
-
 class RegExpBuiltinsAssembler : public CodeStubAssembler {
  public:
-  explicit RegExpBuiltinsAssembler(CodeAssemblerState* state)
+  explicit RegExpBuiltinsAssembler(compiler::CodeAssemblerState* state)
       : CodeStubAssembler(state) {}
 
   void BranchIfFastRegExp(Node* const context, Node* const map,
                           Label* const if_isunmodified,
                           Label* const if_ismodified);
 
  protected:
   Node* FastLoadLastIndex(Node* regexp);
   Node* SlowLoadLastIndex(Node* context, Node* regexp);
   Node* LoadLastIndex(Node* context, Node* regexp, bool is_fastpath);
@@ skipping 71 matching lines @@
   Node* ReplaceGlobalCallableFastPath(Node* context, Node* regexp, Node* string,
                                       Node* replace_callable);
   Node* ReplaceSimpleStringFastPath(Node* context, Node* regexp, Node* string,
                                     Node* replace_string);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_REGEXP_H_