AssemblerBase does not need remember a Zone. Fix this.

src/arm/assembler-arm.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 273 matching lines @@
 const Instr kLdrStrInstrTypeMask = 0xffff0000;
 const Instr kLdrStrInstrArgumentMask = 0x0000ffff;
 const Instr kLdrStrOffsetMask = 0x00000fff;
 
 
 // Spare buffer.
 static const int kMinimalBufferSize = 4*KB;
 
 
 Assembler::Assembler(Isolate* arg_isolate, void* buffer, int buffer_size)
-    : AssemblerBase(arg_isolate, arg_isolate->zone()),
+    : AssemblerBase(arg_isolate),
       positions_recorder_(this),
       emit_debug_code_(FLAG_debug_code) {
   if (buffer == NULL) {
     // Do our own buffer management.
     if (buffer_size <= kMinimalBufferSize) {
       buffer_size = kMinimalBufferSize;
 
       if (isolate()->assembler_spare_buffer() != NULL) {
         buffer = isolate()->assembler_spare_buffer();
         isolate()->set_assembler_spare_buffer(NULL);
@@ skipping 2352 matching lines @@
 
   // Since a constant pool was just emitted, move the check offset forward by
   // the standard interval.
   next_buffer_check_ = pc_offset() + kCheckPoolInterval;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM