Major changes to nsComboboxControlFrame:
Removed commented out code + nsIPluggableEventListener references.
Implemented nsComboboxControlFrame::GetNamesValues
Implemented nsComboboxControlFrame::SetProperty GetProperty methods
Fixed references to previously freed memory in nsComboboxControlFrame::ReResolveStyleContext
Modified ua.css style rules for dropdown-visible, drodown-hidden to have -moz- prefix.
Added -moz-dropdown-btn-out and -moz-dropdown-btn-pressed, -moz-dropdown-list rules.
Modified nsListControlFrame.cpp to calculate the width of the dropdown list for combo boxes correctly
Added nsListControlFrame::GetProperty and SetProperty methods.
Modified nsCSSFrameConstructor::ConstructSelectFrame to setup combobox.
when NS_GFX_RENDER_FORM_ELEMENTS is defined.
Added checks to nsFileControlFrame::Reflow to make sure the pseudo styles actually
could be loaded. If they can't be loaded it uses the file upload elements style.
Changed file-buttonstyle to file-button and file-textstyle to file-text in ua.css
appearance during printing.
Now returns value of file upload element in nsHTMLInputElement::GetValue.
Added :file-textstyle and :file-buttonstyle pseudo style's to ua.css.
Modified nsButtonControlFrame::PaintButton to accept a rectangle describing the
position and size of the button to paint.
Modified nsFileControlFrame::Paint to resolve :file-buttonstyle and :file-textstyle to
paint the file upload's button and text field using settings in ua.css
Added nsFileControlFrame::HasWidget utility method.
Added nsFormControlHelper::GetInputElementValue to get the current value of an input element
from the DOM.
Modified nsTextControlFrame::GetProperty to use nsFormControlHelper::GetInputElementValue
Modified nsTextControlFrame::PaintTextControl to accept a rectangle describing the position
and size of the text control to paint.
Modified nsTextControl::PaintTextControlBackground to include a rectangle describing the
position and size of the text control background to paint.
