[wasm] Be more lenient on the names section.

src/wasm/wasm-module-builder.cc

 // 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.
 
 #include "src/signature.h"
 
 #include "src/handles.h"
 #include "src/v8.h"
 #include "src/zone/zone-containers.h"
 
@@ skipping 491 matching lines @@
   // == Emit names =============================================================
   if (has_names) {
     // Emit the section code.
     buffer.write_u8(kUnknownSectionCode);
     // Emit a placeholder for the length.
     size_t start = buffer.reserve_u32v();
     // Emit the section string.
     buffer.write_size(4);
     buffer.write(reinterpret_cast<const byte*>("name"), 4);
     // Emit the names.
-    buffer.write_size(functions_.size());
+    size_t count = functions_.size() + imports_.size();
+    buffer.write_size(count);
+    for (size_t i = 0; i < imports_.size(); i++) {
+      buffer.write_u8(0);  // empty name for import
+      buffer.write_u8(0);  // no local variables
+    }
     for (auto function : functions_) {
       buffer.write_size(function->name_.size());
       if (function->name_.size() > 0) {
         buffer.write(reinterpret_cast<const byte*>(&function->name_[0]),
                      function->name_.size());
       }
       buffer.write_u8(0);
     }
     FixupSection(buffer, start);
   }
 }
 
 void WasmModuleBuilder::WriteAsmJsOffsetTable(ZoneBuffer& buffer) const {
   // == Emit asm.js offset table ===============================================
   buffer.write_size(functions_.size());
   // Emit the offset table per function.
   for (auto function : functions_) {
     function->WriteAsmWasmOffsetTable(buffer);
   }
 }
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8