[arm] Fix memory leak in disassembler.

src/disassembler.cc

 // Copyright 2011 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.
 
 #include "src/disassembler.h"
 
 #include <memory>
 
 #include "src/assembler-inl.h"
 #include "src/code-stubs.h"
@@ skipping 247 matching lines @@
     }
 
     // If this is a constant pool load and we haven't found any RelocInfo
     // already, check if we can find some RelocInfo for the target address in
     // the constant pool.
     if (pcs.is_empty() && converter.code() != nullptr) {
       RelocInfo dummy_rinfo(prev_pc, RelocInfo::NONE32, 0, nullptr);
       if (dummy_rinfo.IsInConstantPool()) {
         byte* constant_pool_entry_address =
             dummy_rinfo.constant_pool_entry_address();
-        RelocIterator* it = new RelocIterator(converter.code());
-        while (!it->done()) {
-          if (it->rinfo()->IsInConstantPool() &&
-              (it->rinfo()->constant_pool_entry_address() ==
+        RelocIterator reloc_it(converter.code());
+        while (!reloc_it.done()) {
+          if (reloc_it.rinfo()->IsInConstantPool() &&
+              (reloc_it.rinfo()->constant_pool_entry_address() ==
                constant_pool_entry_address)) {
-            PrintRelocInfo(&out, isolate, ref_encoder, os, it->rinfo());
+            PrintRelocInfo(&out, isolate, ref_encoder, os, reloc_it.rinfo());
             break;
           }
-          it->next();
+          reloc_it.next();
         }
       }
     }
 
     DumpBuffer(os, &out);
   }
 
   // Emit comments following the last instruction (if any).
   if (it != NULL) {
     for ( ; !it->done(); it->next()) {
@@ skipping 20 matching lines @@
 
 int Disassembler::Decode(Isolate* isolate, std::ostream* os, byte* begin,
                          byte* end, Code* code) {
   return 0;
 }
 
 #endif  // ENABLE_DISASSEMBLER
 
 }  // namespace internal
 }  // namespace v8