Merge V8 5.2.361.47  DO NOT MERGE

https://chromium.googlesource.com/v8/v8/+/5.2.361.47

FPIIM-449

Change-Id: Ibec421b85a9b88cb3a432ada642e469fe7e78346
(cherry picked from commit bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8)
diff --git a/src/compiler/int64-lowering.h b/src/compiler/int64-lowering.h
index 7f6ef9a..054c421 100644
--- a/src/compiler/int64-lowering.h
+++ b/src/compiler/int64-lowering.h
@@ -23,6 +23,9 @@
 
   void LowerGraph();
 
+  static int GetParameterCountAfterLowering(
+      Signature<MachineRepresentation>* signature);
+
  private:
   enum class State : uint8_t { kUnvisited, kOnStack, kVisited };