[wasm] Wasm functions with int64 parameters can now be called from JS.

src/compiler/int64-lowering.h

Index: src/compiler/int64-lowering.h
diff --git a/src/compiler/int64-lowering.h b/src/compiler/int64-lowering.h
index 7f6ef9a297c1b3f21e6563ddbf10170c61d89572..054c4219948bb640fc4bc43adb89f655046c4987 100644
--- a/src/compiler/int64-lowering.h
+++ b/src/compiler/int64-lowering.h
@@ -23,6 +23,9 @@ class Int64Lowering {
 
   void LowerGraph();
 
+  static int GetParameterCountAfterLowering(
+      Signature<MachineRepresentation>* signature);
+
  private:
   enum class State : uint8_t { kUnvisited, kOnStack, kVisited };