[wasm] Refactor import handling for 0xC.

test/unittests/wasm/ast-decoder-unittest.cc

Index: test/unittests/wasm/ast-decoder-unittest.cc
diff --git a/test/unittests/wasm/ast-decoder-unittest.cc b/test/unittests/wasm/ast-decoder-unittest.cc
index c1468ab29f6e436d5af748841ba8d7ac74e45a14..c9d45db580016e73ccd6c5e67e472d2fa37e39ab 100644
--- a/test/unittests/wasm/ast-decoder-unittest.cc
+++ b/test/unittests/wasm/ast-decoder-unittest.cc
@@ -1283,7 +1283,7 @@ class TestModuleEnv : public ModuleEnv {
     module = &mod;
   }
   byte AddGlobal(LocalType type, bool mutability = true) {
-    mod.globals.push_back({type, mutability, NO_INIT, 0, false, false});
+    mod.globals.push_back({type, mutability, WasmInitExpr(), 0, false, false});
     CHECK(mod.globals.size() <= 127);
     return static_cast<byte>(mod.globals.size() - 1);
   }