In file included from virtual_methods.cpp:5:
./virtual_methods.h:17:36: warning: [chromium-style] virtual methods with non-empty bodies shouldn't be declared inline.
  virtual bool ComplainAboutThis() { return true; }
                                   ^
./virtual_methods.h:23:3: warning: [chromium-style] Overriding method must have "virtual" keyword.
  void MethodHasNoArguments() override;
  ^
2 warnings generated.