Push the general AST id field down from ASTNode to Expression.

src/full-codegen.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 351 matching lines @@
   // the operands allow it.  Returns true if the compare operations
   // has been matched and all code generated; false otherwise.
   bool TryLiteralCompare(Token::Value op,
                          Expression* left,
                          Expression* right,
                          Label* if_true,
                          Label* if_false,
                          Label* fall_through);
 
   // Bailout support.
-  void PrepareForBailout(AstNode* node, State state);
+  void PrepareForBailout(Expression* node, State state);
   void PrepareForBailoutForId(int id, State state);
 
   // Record a call's return site offset, used to rebuild the frame if the
   // called function was inlined at the site.
   void RecordJSReturnSite(Call* call);
 
   // Prepare for bailout before a test (or compare) and branch.  If
   // should_normalize, then the following comparison will not handle the
   // canonical JS true value so we will insert a (dead) test against true at
   // the actual bailout target from the optimized code. If not
@@ skipping 379 matching lines @@
 
   friend class NestedStatement;
 
   DISALLOW_COPY_AND_ASSIGN(FullCodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FULL_CODEGEN_H_