Un-revert the addition of more ABI checks for LibreOfficeKitClass

Change-Id: Idf2ebb552065fa600a4010e83a24a0f13651c029

desktop/qa/desktop_lib/test_desktop_lib.cxx

@@ -2463,6 +2463,11 @@ void DesktopLOKTest::testInsertCertificatePEM()
 
 namespace {
 
+constexpr size_t classOffset(int i)
+{
+    return sizeof(static_cast<struct _LibreOfficeKitClass*>(nullptr)->nSize) + i * sizeof(void*);
+}
+
 constexpr size_t documentClassOffset(int i)
 {
     return sizeof(static_cast<struct _LibreOfficeKitDocumentClass*>(nullptr)->nSize) + i * sizeof(void*);
@@ -2473,6 +2478,18 @@ constexpr size_t documentClassOffset(int i)
 void DesktopLOKTest::testABI()
 {
     // STABLE ABI, NEVER CHANGE (unless there's a very good reason, agreed by ESC, etc.)
+    CPPUNIT_ASSERT_EQUAL(classOffset(0), offsetof(struct _LibreOfficeKitClass, destroy));
+    CPPUNIT_ASSERT_EQUAL(classOffset(1), offsetof(struct _LibreOfficeKitClass, documentLoad));
+    CPPUNIT_ASSERT_EQUAL(classOffset(2), offsetof(struct _LibreOfficeKitClass, getError));
+    CPPUNIT_ASSERT_EQUAL(classOffset(3), offsetof(struct _LibreOfficeKitClass, documentLoadWithOptions));
+    CPPUNIT_ASSERT_EQUAL(classOffset(4), offsetof(struct _LibreOfficeKitClass, freeError));
+    CPPUNIT_ASSERT_EQUAL(classOffset(5), offsetof(struct _LibreOfficeKitClass, registerCallback));
+    CPPUNIT_ASSERT_EQUAL(classOffset(6), offsetof(struct _LibreOfficeKitClass, getFilterTypes));
+    CPPUNIT_ASSERT_EQUAL(classOffset(7), offsetof(struct _LibreOfficeKitClass, setOptionalFeatures));
+    CPPUNIT_ASSERT_EQUAL(classOffset(8), offsetof(struct _LibreOfficeKitClass, setDocumentPassword));
+    CPPUNIT_ASSERT_EQUAL(classOffset(9), offsetof(struct _LibreOfficeKitClass, getVersionInfo));
+    CPPUNIT_ASSERT_EQUAL(classOffset(10), offsetof(struct _LibreOfficeKitClass, runMacro));
+
     CPPUNIT_ASSERT_EQUAL(documentClassOffset(0), offsetof(struct _LibreOfficeKitDocumentClass, destroy));
     CPPUNIT_ASSERT_EQUAL(documentClassOffset(1), offsetof(struct _LibreOfficeKitDocumentClass, saveAs));