Button marks itself dirty when the suggested size is set.

b 28593, r=kmcclusk,buster

layout/forms/nsGfxButtonControlFrame.cpp

@@ -612,6 +612,7 @@ nsGfxButtonControlFrame::SetSuggestedSize(nscoord aWidth, nscoord aHeight)
 {
   mSuggestedWidth = aWidth;
   mSuggestedHeight = aHeight;
+  mState |= NS_FRAME_IS_DIRTY;
   return NS_OK;
 }
 

layout/html/forms/src/nsGfxButtonControlFrame.cpp

@@ -612,6 +612,7 @@ nsGfxButtonControlFrame::SetSuggestedSize(nscoord aWidth, nscoord aHeight)
 {
   mSuggestedWidth = aWidth;
   mSuggestedHeight = aHeight;
+  mState |= NS_FRAME_IS_DIRTY;
   return NS_OK;
 }