Update from https://crrev.com/329939

tools/clang/plugins/tests/virtual_specifiers.cpp

Index: tools/clang/plugins/tests/virtual_specifiers.cpp
diff --git a/tools/clang/plugins/tests/virtual_specifiers.cpp b/tools/clang/plugins/tests/virtual_specifiers.cpp
index 210324809f1ee7d7a41ad3f3108a61f52d6ffd9f..f566ac4f2a6cd205c493f8446803f7f397d29ab2 100644
--- a/tools/clang/plugins/tests/virtual_specifiers.cpp
+++ b/tools/clang/plugins/tests/virtual_specifiers.cpp
@@ -5,6 +5,7 @@
 // Tests for chromium style checks for virtual/override/final specifiers on
 // virtual methods.
 
+// Note: This is not actual windows.h but the stub file in system/windows.h
 #include <windows.h>
 
 // Purposely use macros to test that the FixIt hints don't try to remove the
@@ -116,3 +117,16 @@ class MyNotTest : public testing::NotTest {
   virtual ~MyNotTest();
   virtual void SetUp() override;
 };
+
+class MacroBase {
+ public:
+  virtual void AddRef() = 0;
+  virtual void Virtual() {}
+};
+
+class Sub : public MacroBase {
+  // Shouldn't warn.
+  END_COM_MAP()
+  SYSTEM_REDUNDANT1;
+  SYSTEM_REDUNDANT2;
+};