A human pointer-button press (mouse-down) at a viewport point WITHOUT a release — the start of a
click-drag. Pairs with RemoteBrowserPointerUpInput (and any intervening
RemoteBrowserPointerMoveInputs) to relay a drag, e.g. click-drag text selection in a field.
A human pointer-button press (mouse-down) at a viewport point WITHOUT a release — the start of a click-drag. Pairs with RemoteBrowserPointerUpInput (and any intervening RemoteBrowserPointerMoveInputs) to relay a drag, e.g. click-drag text selection in a field.