[wasm] Rework encoding of local declarations.

src/wasm/encoder.h

 // Copyright 2015 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.
 
 #ifndef V8_WASM_ENCODER_H_
 #define V8_WASM_ENCODER_H_
 
 #include "src/signature.h"
 #include "src/zone-containers.h"
 
@@ skipping 24 matching lines @@
   ZoneVector<LocalType> params_;
   uint16_t local_i32_count_;
   uint16_t local_i64_count_;
   uint16_t local_f32_count_;
   uint16_t local_f64_count_;
   bool exported_;
   bool external_;
   ZoneVector<uint8_t> body_;
   ZoneVector<char> name_;
 
-  bool HasLocals() const {
-    return (local_i32_count_ + local_i64_count_ + local_f32_count_ +
-            local_f64_count_) > 0;
-  }
-
   bool HasName() const { return (exported_ || external_) && name_.size() > 0; }
 };
 
 class WasmFunctionBuilder : public ZoneObject {
  public:
   uint16_t AddParam(LocalType type);
   uint16_t AddLocal(LocalType type);
   void ReturnType(LocalType type);
   void EmitCode(const byte* code, uint32_t code_size);
   void EmitCode(const byte* code, uint32_t code_size,
@@ skipping 90 matching lines @@
   SignatureMap signature_map_;
   int start_function_index_;
 };
 
 std::vector<uint8_t> UnsignedLEB128From(uint32_t result);
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_ENCODER_H_