Make maps in monomorphic IC stubs weak.

src/stub-cache.cc

 // Copyright 2012 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 1254 matching lines @@
   }
 }
 
 
 Handle<Code> BaseLoadStoreStubCompiler::GetICCode(Code::Kind kind,
                                                   Code::StubType type,
                                                   Handle<Name> name,
                                                   InlineCacheState state) {
   Code::Flags flags = Code::ComputeFlags(kind, state, extra_state(), type);
   Handle<Code> code = GetCodeWithFlags(flags, name);
+  IC::RegisterWeakMapDependency(code);
   PROFILE(isolate(), CodeCreateEvent(log_kind(code), *code, *name));
   JitEvent(name, code);
   return code;
 }
 
 
 Handle<Code> BaseLoadStoreStubCompiler::GetCode(Code::Kind kind,
                                                 Code::StubType type,
                                                 Handle<Name> name) {
   ASSERT_EQ(kNoExtraICState, extra_state());
@@ skipping 208 matching lines @@
           Handle<FunctionTemplateInfo>(
               FunctionTemplateInfo::cast(signature->receiver()));
     }
   }
 
   is_simple_api_call_ = true;
 }
 
 
 } }  // namespace v8::internal