Add always-on-top property to app windows

apps/app_window_contents.cc

 // Copyright 2013 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 "apps/app_window_contents.h"
 
 #include "apps/native_app_window.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/api/app_window.h"
@@ skipping 74 matching lines @@
   app_window::Bounds update;
   update.left.reset(new int(bounds.x()));
   update.top.reset(new int(bounds.y()));
   update.width.reset(new int(bounds.width()));
   update.height.reset(new int(bounds.height()));
   dictionary->Set("bounds", update.ToValue().release());
   dictionary->SetBoolean("fullscreen",
                          native_app_window->IsFullscreenOrPending());
   dictionary->SetBoolean("minimized", native_app_window->IsMinimized());
   dictionary->SetBoolean("maximized", native_app_window->IsMaximized());
+  dictionary->SetBoolean("alwaysOnTop", native_app_window->IsAlwaysOnTop());
 
   content::RenderViewHost* rvh = web_contents_->GetRenderViewHost();
   rvh->Send(new ExtensionMsg_MessageInvoke(rvh->GetRoutingID(),
                                            host_->extension_id(),
                                            "app.window",
                                            "updateAppWindowProperties",
                                            args,
                                            false));
 }
 
@@ skipping 62 matching lines @@
     content::RenderViewHost* rvh) {
   DCHECK(rvh);
   content::BrowserThread::PostTask(
       content::BrowserThread::IO, FROM_HERE,
       base::Bind(&content::ResourceDispatcherHost::BlockRequestsForRoute,
                  base::Unretained(content::ResourceDispatcherHost::Get()),
                  rvh->GetProcess()->GetID(), rvh->GetRoutingID()));
 }
 
 }  // namespace apps