Follow macro invocations when checking if a violation happened in a .cc file.

tools/clang/plugins/tests/inline_ctor.cpp

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#define MACRO_FROM_CPP INLINE_CTORS_IN_A_MACRO(InlineCtorsInvolvingCppAreOK)
+
 #include "inline_ctor.h"
 
 #include <string>
 #include <vector>
 
 // We don't warn on classes that are in CPP files.
 class InlineInCPPOK {
  public:
   InlineInCPPOK() {}
   ~InlineInCPPOK() {}
 
  private:
   std::vector<int> one_;
   std::vector<std::string> two_;
 };
 
+INLINE_CTORS_IN_A_MACRO(InlineCtorsBehindAMacroAreOKInCpp);
+
 int main() {
   InlineInCPPOK one;
   InlineCtorsArentOKInHeader two;
+  InlineCtorsBehindAMacroArentOKInHeader three;
+  InlineCtorsBehindAMacroAreOKInCpp four;
+  InlineCtorsInvolvingCppAreOK five;
   return 0;
 }