Make GrReducedClip's gen ID only apply to the element list

tests/ClipStackTest.cpp

Index: tests/ClipStackTest.cpp
diff --git a/tests/ClipStackTest.cpp b/tests/ClipStackTest.cpp
index 5265ac2c670a97c06f9044339020b90ec1196d7c..1b096588c3a0ed6a5849fda73830dafc4e9e0951 100644
--- a/tests/ClipStackTest.cpp
+++ b/tests/ClipStackTest.cpp
@@ -1196,6 +1196,8 @@ static void test_aa_query(skiatest::Reporter* reporter, const SkString& testName
     switch (expectedMethod) {
         case ClipMethod::kSkipDraw:
             SkASSERT(0 == numExpectedElems);
+            REPORTER_ASSERT_MESSAGE(reporter, SkClipStack::kEmptyGenID == reduced.genID(),
+                                    testName.c_str());
             REPORTER_ASSERT_MESSAGE(reporter, reduced.elements().isEmpty(), testName.c_str());
             REPORTER_ASSERT_MESSAGE(reporter,
                                     GrReducedClip::InitialState::kAllOut == reduced.initialState(),
@@ -1203,6 +1205,9 @@ static void test_aa_query(skiatest::Reporter* reporter, const SkString& testName
             return;
         case ClipMethod::kIgnoreClip:
             SkASSERT(0 == numExpectedElems);
+            SkASSERT(SkClipStack::kWideOpenGenID == reduced.genID());
+            REPORTER_ASSERT_MESSAGE(reporter, SkClipStack::kWideOpenGenID == reduced.genID(),
+                                    testName.c_str());
             REPORTER_ASSERT_MESSAGE(reporter,
                                     !reduced.hasIBounds() ||
                                     GrClip::IsInsideClip(reduced.ibounds(), queryBounds),