Mac: fix fullscreen floating bar in popup windows.

chrome/browser/cocoa/browser_window_controller.mm

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/cocoa/browser_window_controller.h"
 
 #include <Carbon/Carbon.h>
 
 #include "app/l10n_util_mac.h"
 #include "base/mac_util.h"
@@ skipping 416 matching lines @@
 - (void)windowDidBecomeMain:(NSNotification*)notification {
   BrowserList::SetLastActive(browser_.get());
   [self saveWindowPositionIfNeeded];
 
   // TODO(dmaclach): Instead of redrawing the whole window, views that care
   // about the active window state should be registering for notifications.
   [[self window] setViewsNeedDisplay:YES];
 
   // TODO(viettrungluu): For some reason, the above doesn't suffice.
   if ([self isFullscreen])
-    [floatingBarBackingView_ setNeedsDisplay:YES];
+    [floatingBarBackingView_ setNeedsDisplay:YES];  // Okay even if nil.
 }
 
 - (void)windowDidResignMain:(NSNotification*)notification {
   // TODO(dmaclach): Instead of redrawing the whole window, views that care
   // about the active window state should be registering for notifications.
   [[self window] setViewsNeedDisplay:YES];
 
   // TODO(viettrungluu): For some reason, the above doesn't suffice.
   if ([self isFullscreen])
-    [floatingBarBackingView_ setNeedsDisplay:YES];
+    [floatingBarBackingView_ setNeedsDisplay:YES];  // Okay even if nil.
 }
 
 // Called when we are activated (when we gain focus).
 - (void)windowDidBecomeKey:(NSNotification*)notification {
   // We need to activate the controls (in the "WebView"). To do this, get the
   // selected TabContents's RenderWidgetHostViewMac and tell it to activate.
   if (TabContents* contents = browser_->GetSelectedTabContents()) {
     if (RenderWidgetHostView* rwhv = contents->GetRenderWidgetHostView())
       rwhv->SetActive(true);
   }
@@ skipping 1338 matching lines @@
 
 - (BOOL)supportsBookmarkBar {
   return [self supportsWindowFeature:Browser::FEATURE_BOOKMARKBAR];
 }
 
 - (BOOL)isNormalWindow {
   return browser_->type() == Browser::TYPE_NORMAL;
 }
 
 @end  // @implementation BrowserWindowController(WindowType)