Aura: Support hovering restore & close buttons for full screen apps

chrome/browser/ui/views/frame/browser_frame_aura.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/views/frame/browser_frame_aura.h"
 
 #include "ash/ash_switches.h"
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "chrome/browser/chromeos/status/status_area_view.h"
@@ skipping 211 matching lines @@
                                  BrowserFrame* browser_frame)
       : browser_frame_aura_(browser_frame_aura),
         browser_frame_(browser_frame) {}
 
   virtual void OnWindowPropertyChanged(aura::Window* window,
                                        const void* key,
                                        intptr_t old) {
     if (key != aura::client::kShowStateKey)
       return;
 
+    // Allow the frame to be replaced when maximizing an app.
+    if (browser_frame_->non_client_view() &&
+        browser_frame_aura_->browser_view()->browser()->is_app())
+      browser_frame_->non_client_view()->UpdateFrame();
+
     // When migrating from regular ChromeOS to Aura, windows can have saved
     // restore bounds that are exactly equal to the maximized bounds.  Thus when
     // you hit maximize, there is no resize and the layout doesn't get
     // refreshed. This can also theoretically happen if a user drags a window to
     // 0,0 then resizes it to fill the workspace, then hits maximize.  We need
     // to force a layout on show state changes.  crbug.com/108073
     if (browser_frame_->non_client_view())
       browser_frame_->non_client_view()->Layout();
 
     // Watch for status area bounds change for maximized browser window in Aura
@@ skipping 76 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeBrowserFrame, public:
 
 // static
 NativeBrowserFrame* NativeBrowserFrame::CreateNativeBrowserFrame(
     BrowserFrame* browser_frame,
     BrowserView* browser_view) {
   return new BrowserFrameAura(browser_frame, browser_view);
 }