reland of https://codereview.chromium.org/11364053/ w/o removing the per-rootwindow stacking client

chrome/browser/ui/browser_commands.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/browser_commands.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
@@ skipping 288 matching lines @@
       OpenEmptyWindow(profile->GetOriginalProfile(), desktop_type);
     }
   }
 }
 
 void NewEmptyWindow(Profile* profile) {
   NewEmptyWindow(profile, HOST_DESKTOP_TYPE_NATIVE);
 }
 
 Browser* OpenEmptyWindow(Profile* profile, HostDesktopType desktop_type) {
+  // TODO(scottmg): http://crbug.com/128578
+  // This is necessary because WebContentsViewAura doesn't have enough context
+  // to get the right StackingClient (and therefore parent window) otherwise.
+  ScopedForceDesktopType force_desktop_type(desktop_type);
   Browser* browser = new Browser(
       Browser::CreateParams(Browser::TYPE_TABBED, profile, desktop_type));
   AddBlankTabAt(browser, -1, true);
   browser->window()->Show();
   return browser;
 }
 
 Browser* OpenEmptyWindow(Profile* profile) {
   return OpenEmptyWindow(profile, HOST_DESKTOP_TYPE_NATIVE);
 }
@@ skipping 765 matching lines @@
         BrowserCommandsTabContentsCreator::CreateTabContents(contents);
   }
   app_browser->tab_strip_model()->AppendTabContents(tab_contents, true);
 
   contents->GetMutableRendererPrefs()->can_accept_load_drops = false;
   contents->GetRenderViewHost()->SyncRendererPrefs();
   app_browser->window()->Show();
 }
 
 }  // namespace chrome