Fixed a bug wherein tree frames weren't being added to the flow.

content/html/style/src/nsHTMLStyleSheet.cpp

@@ -2117,6 +2117,10 @@ HTMLStyleSheetImpl::ConstructXULFrame(nsIPresContext*  aPresContext,
 
         // Add the placeholder frame to the flow
         aNewFrame = placeholderFrame;
+      }
+	  else {
+        // Add the table frame to the flow
+        aFrameItems.AddChild(aNewFrame);
       }
       return rv;
   }

layout/html/style/src/nsHTMLStyleSheet.cpp

@@ -2117,6 +2117,10 @@ HTMLStyleSheetImpl::ConstructXULFrame(nsIPresContext*  aPresContext,
 
         // Add the placeholder frame to the flow
         aNewFrame = placeholderFrame;
+      }
+	  else {
+        // Add the table frame to the flow
+        aFrameItems.AddChild(aNewFrame);
       }
       return rv;
   }

layout/style/nsHTMLStyleSheet.cpp

@@ -2117,6 +2117,10 @@ HTMLStyleSheetImpl::ConstructXULFrame(nsIPresContext*  aPresContext,
 
         // Add the placeholder frame to the flow
         aNewFrame = placeholderFrame;
+      }
+	  else {
+        // Add the table frame to the flow
+        aFrameItems.AddChild(aNewFrame);
       }
       return rv;
   }