No, "scaling" is what the interface does as the result of a gesture, pinching is what the fingers do which again is not defined in the document. There's a reason the patent is called "Application programming interfaces for scrolling operations": it focusses on scrolling and how that operation is distinguished from a gesture. And a gesture is just defined as having 2 ore more input points without further elaborating on the state of those input points.
Scrolling is defined in the full patent text as :
"Scrolling is the act of sliding a directional (e.g., horizontal or vertical) presentation of content, such as text, drawings, or images, across a screen or display window. In a typical graphical user interface, scrolling is done with the help of a scrollbar or using keyboard shortcuts often the arrow keys. Gesturing is a type of user input with two or more input points. Animating operations include changing content within a given time period."
So, they only mention the 2 axis.