Bug 457997 - Autohiding glass panels don't display properly r=vlad,dao

browser/base/content/browser.xul

@@ -234,12 +234,7 @@
       <label crop="center" flex="1" class="tooltip-label"/>
     </tooltip>
 
-    <panel id="ctrlTab-panel" class="KUI-panel" hidden="true" norestorefocus="true" ignorekeys="true"
-#ifdef XP_WIN
-# XXX bug 457997
-      noautohide="true"
-#endif
-    >
+    <panel id="ctrlTab-panel" class="KUI-panel" hidden="true" norestorefocus="true" ignorekeys="true">
       <hbox pack="center">
         <textbox id="ctrlTab-search"
                  type="search"

widget/src/windows/nsWindow.cpp

@@ -7877,12 +7877,13 @@ nsWindow :: DealWithPopups ( HWND inWnd, UINT inMsg, WPARAM inWParam, LPARAM inL
         inMsg == WM_NCRBUTTONDOWN || 
         inMsg == WM_MOVING || 
         inMsg == WM_SIZING || 
-        inMsg == WM_GETMINMAXINFO ||
         inMsg == WM_NCLBUTTONDOWN || 
         inMsg == WM_NCMBUTTONDOWN ||
         inMsg == WM_MOUSEACTIVATE ||
         inMsg == WM_ACTIVATEAPP ||
         inMsg == WM_MENUSELECT ||
+        // Non-toplevel windows normally don't get WM_GETMINMAXINFO.
+        // Therefore if a non-toplevel window gets this message, we should ignore it.
         (inMsg == WM_GETMINMAXINFO && !::GetParent(inWnd))
 #endif
         )