[wasm][asm.js] Allow a function to be exported more than once.

src/asmjs/asm-wasm-builder.cc

Index: src/asmjs/asm-wasm-builder.cc
diff --git a/src/asmjs/asm-wasm-builder.cc b/src/asmjs/asm-wasm-builder.cc
index 79845fcbe7db7f2242b37209da7d13b9b5e33d4d..d6b88e00257a16ce89646e93ae9e796e2b241e7f 100644
--- a/src/asmjs/asm-wasm-builder.cc
+++ b/src/asmjs/asm-wasm-builder.cc
@@ -715,9 +715,8 @@ class AsmWasmBuilderImpl final : public AstVisitor<AsmWasmBuilderImpl> {
       const AstRawString* raw_name = name->AsRawPropertyName();
       if (var->is_function()) {
         WasmFunctionBuilder* function = LookupOrInsertFunction(var);
-        function->Export();
-        function->SetName({reinterpret_cast<const char*>(raw_name->raw_data()),
-                           raw_name->length()});
+        function->ExportAs({reinterpret_cast<const char*>(raw_name->raw_data()),
+                            raw_name->length()});
       }
     }
   }