Fix product build break.

runtime/vm/compiler.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 1393 matching lines @@
                 function.ToFullyQualifiedCString(),
                 function.token_pos().ToCString(),
                 token_size);
     }
     ParsedFunction* parsed_function = new(zone) ParsedFunction(
         thread, Function::ZoneHandle(zone, function.raw()));
     pipeline->ParseFunction(parsed_function);
     // For now we just walk thru the AST nodes and in DEBUG mode we print
     // them otherwise just skip through them, this will be need to be
     // wired to generate the IR format.
+#if !defined(PRODUCT)
 #if defined(DEBUG)
     AstPrinter ast_printer(true);
 #else
     AstPrinter ast_printer(false);
 #endif  // defined(DEBUG).
     ast_printer.PrintFunctionNodes(*parsed_function);
+#endif  // !defined(PRODUCT).
     return Error::null();
   } else {
     Thread* const thread = Thread::Current();
     StackZone stack_zone(thread);
     Error& error = Error::Handle();
     // We got an error during compilation or it is a bailout from background
     // compilation (e.g., during parsing with EnsureIsFinalized).
     error = thread->sticky_error();
     thread->clear_sticky_error();
     // Unoptimized compilation or precompilation may encounter compile-time
@@ skipping 879 matching lines @@
 
 
 bool BackgroundCompiler::IsDisabled() {
   UNREACHABLE();
   return true;
 }
 
 #endif  // DART_PRECOMPILED_RUNTIME
 
 }  // namespace dart