Bug 387347 Text with "float" style inaccessible

r=aaronleventhal

accessible/src/base/nsAccessibilityAtomList.h

@@ -77,6 +77,7 @@ ACCESSIBILITY_ATOM(deckFrame, "DeckFrame")
 ACCESSIBILITY_ATOM(inlineBlockFrame, "InlineBlockFrame")
 ACCESSIBILITY_ATOM(inlineFrame, "InlineFrame")
 ACCESSIBILITY_ATOM(objectFrame, "ObjectFrame")
+ACCESSIBILITY_ATOM(placeholderFrame, "PlaceholderFrame")
 ACCESSIBILITY_ATOM(scrollFrame, "ScrollFrame")
 ACCESSIBILITY_ATOM(textFrame, "TextFrame")
 ACCESSIBILITY_ATOM(tableCellFrame, "TableCellFrame")

accessible/src/base/nsAccessibilityService.cpp

@@ -1384,7 +1384,8 @@ NS_IMETHODIMP nsAccessibilityService::GetAccessible(nsIDOMNode *aNode,
     }
 
     if (tryFrame) {
-      if (frame->GetRect().IsEmpty()) {
+      if (frame->GetType() != nsAccessibilityAtoms::placeholderFrame &&
+          frame->GetRect().IsEmpty()) {
         *aIsHidden = PR_TRUE;
         return NS_OK;
       }