Bug 2052629 - Remove unused nsSelectsAreaFrame from FrameClasses.py r=layout-reviewers,emilio

Differential Revision: https://phabricator.services.mozilla.com/D320627

layout/forms/nsListControlFrame.cpp

@@ -243,7 +243,7 @@ void nsListControlFrame::Reflow(nsPresContext* aPresContext,
   mMightNeedSecondPass = false;
 
   // Now see whether we need a second pass.  If we do, our
-  // nsSelectsAreaFrame will have suppressed the scrollbar update.
+  // scrolled frame will have suppressed the scrollbar update.
   if (mBSizeOfARow == oldBSizeOfARow) {
     return;
   }

layout/forms/nsListControlFrame.h

@@ -87,7 +87,7 @@ class nsListControlFrame final : public mozilla::ScrollContainerFrame {
   bool IsFocused() const;
 
   /**
-   * Function to paint the focus rect when our nsSelectsAreaFrame is painting.
+   * Function to paint the focus rect when our scrolled frame is painting.
    * @param aPt the offset of this frame, relative to the rendering reference
    * frame
    */

layout/generic/FrameClasses.py

@@ -109,7 +109,6 @@ FRAME_CLASSES = [
     Frame("SimpleXULLeafFrame", "SimpleXULLeaf", COMMON | LEAF),
     Frame("nsScrollbarButtonFrame", "SimpleXULLeaf", COMMON | LEAF),
     Frame("nsScrollbarFrame", "Scrollbar", COMMON),
-    Frame("nsSelectsAreaFrame", "Block", BLOCK | BFC),
     Frame("nsPageSequenceFrame", "PageSequence", COMMON),
     Frame("nsSliderFrame", "Slider", COMMON),
     Frame("nsSplitterFrame", "SimpleXULLeaf", COMMON | LEAF),

layout/generic/nsIFrame.cpp

@@ -539,7 +539,7 @@ static bool IsFontSizeInflationContainer(nsIFrame* aFrame,
        frameType == LayoutFrameType::Letter) ||
       // Given multiple frames for the same node, only the
       // outer one should be considered a container.
-      // (Important, e.g., for nsSelectsAreaFrame.)
+      // (Important, e.g., for scrolled frames.)
       (aFrame->GetParent()->GetContent() == content) ||
       (content &&
        // Form controls shouldn't become inflation containers.