[wasm] Clean up handling of function names.

src/compiler/wasm-compiler.h

Index: src/compiler/wasm-compiler.h
diff --git a/src/compiler/wasm-compiler.h b/src/compiler/wasm-compiler.h
index 3fd52aa57753fb7c3679eaef8862a04274ad6616..082f198bf49f01d48dc0bba009a7f8ae83303aaa 100644
--- a/src/compiler/wasm-compiler.h
+++ b/src/compiler/wasm-compiler.h
@@ -35,7 +35,7 @@ namespace compiler {
 // Compiles a single function, producing a code object.
 Handle<Code> CompileWasmFunction(wasm::ErrorThrower& thrower, Isolate* isolate,
                                  wasm::ModuleEnv* module_env,
-                                 const wasm::WasmFunction& function, int index);
+                                 const wasm::WasmFunction& function);
 
 // Wraps a JS function, producing a code object that can be called from WASM.
 Handle<Code> CompileWasmToJSWrapper(Isolate* isolate, wasm::ModuleEnv* module,