Bug 978700: Remove unused variables in widget/, r=roc
Bug 978700: Fix some warnings about redefined preprocessor tokens, r=roc
Bug 978700: Fix warning about initialization order in constructor, r=roc
Bug 978700: Fix warnings about uninitialized variables, r=roc
Bug 978700: Fix warnings about comparison of values with different signs, r=roc
Bug 978700: Fix warning about non-virtual destructor, r=roc