[wasm] factor lower level utilties out of WasmFullDecoder

src/wasm/wasm-text.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-text.h"
 
 #include "src/debug/interface-types.h"
 #include "src/ostreams.h"
 #include "src/vector.h"
 #include "src/wasm/function-body-decoder.h"
@@ skipping 155 matching lines @@
   }
   os << "\n";
   ++line_nr;
 
   // Print the local declarations.
   BodyLocalDecls decls(&zone);
   Vector<const byte> func_bytes = wire_bytes.module_bytes.SubVector(
       fun->code_start_offset, fun->code_end_offset);
   BytecodeIterator i(func_bytes.begin(), func_bytes.end(), &decls);
   DCHECK_LT(func_bytes.begin(), i.pc());
-  if (!decls.local_types.empty()) {
+  if (!decls.type_list.empty()) {
     os << "(local";
-    for (auto p : decls.local_types) {
-      for (unsigned i = 0; i < p.second; ++i)
-        os << ' ' << WasmOpcodes::TypeName(p.first);
+    for (const ValueType &v : decls.type_list) {
+      os << ' ' << WasmOpcodes::TypeName(v);
     }
     os << ")\n";
     ++line_nr;
   }
 
   for (; i.has_next(); i.next()) {
     WasmOpcode opcode = i.current();
     if (opcode == kExprElse || opcode == kExprEnd) --control_depth;
 
     DCHECK_LE(0, control_depth);
@@ skipping 114 matching lines @@
       default:
         UNREACHABLE();
         break;
     }
     os << '\n';
     ++line_nr;
   }
   DCHECK_EQ(0, control_depth);
   DCHECK(i.ok());
 }