Enable emplace_back for zone containers

src/wasm/wasm-interpreter.cc

 // Copyright 2016 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/wasm/wasm-interpreter.h"
 
 #include "src/utils.h"
 #include "src/wasm/decoder.h"
 #include "src/wasm/function-body-decoder.h"
 #include "src/wasm/wasm-external-refs.h"
@@ skipping 1760 matching lines @@
   const ZoneVector<uint8_t> module_bytes_;
   CodeMap codemap_;
   ZoneVector<ThreadImpl> threads_;
 
   WasmInterpreterInternals(Zone* zone, const ModuleBytesEnv& env)
       : instance_(env.instance),
         module_bytes_(env.module_bytes.start(), env.module_bytes.end(), zone),
         codemap_(env.instance ? env.instance->module : nullptr,
                  module_bytes_.data(), zone),
         threads_(zone) {
-    threads_.push_back(ThreadImpl(zone, &codemap_, env.instance));
+    threads_.emplace_back(zone, &codemap_, env.instance);
   }
 
   void Delete() { threads_.clear(); }
 };
 
 //============================================================================
 // Implementation of the public interface of the interpreter.
 //============================================================================
 WasmInterpreter::WasmInterpreter(const ModuleBytesEnv& env,
                                  AccountingAllocator* allocator)
@@ skipping 100 matching lines @@
 
 ControlTransferMap WasmInterpreter::ComputeControlTransfersForTesting(
     Zone* zone, const byte* start, const byte* end) {
   ControlTransfers targets(zone, nullptr, start, end);
   return targets.map_;
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8