Fix black titlebar rendering when toggling DWM when the window is maximized:...

chrome/views/non_client_view.cc

 // Copyright (c) 2006-2008 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/views/non_client_view.h"
 
 #include "chrome/common/win_util.h"
 #include "chrome/views/root_view.h"
 #include "chrome/views/window.h"
 
@@ skipping 48 matching lines @@
   // behind the entire client area. This is because for some reason the
   // SkPorterDuff::kClear_mode erase done in the RootView thinks the window is
   // still opaque. So, to work around this we hide the window as soon as we can
   // (now), saving off its placement so it can be properly restored once
   // everything has settled down.
   WINDOWPLACEMENT saved_window_placement;
   saved_window_placement.length = sizeof(WINDOWPLACEMENT);
   GetWindowPlacement(frame_->GetHWND(), &saved_window_placement);
   frame_->Hide();
 
+  // Important (and ugly) step: restore the window first, since our hiding hack
+  // doesn't work for maximized windows! We tell the frame not to allow itself
+  // to be made visible though, which removes the brief flicker.
+  frame_->set_force_hidden(true);
+  ShowWindow(frame_->GetHWND(), SW_RESTORE);
+  frame_->set_force_hidden(false);
+  
   SetUseNativeFrame(win_util::ShouldUseVistaFrame());
 
   // Now that we've updated the frame, we'll want to restore our saved placement
   // since the display should have settled down and we can be properly rendered.
   SetWindowPlacement(frame_->GetHWND(), &saved_window_placement);
 }
 
 void NonClientView::SetUseNativeFrame(bool use_native_frame) {
   use_native_frame_ = use_native_frame;
   SetFrameView(frame_->CreateFrameViewForWindow());
@@ skipping 156 matching lines @@
   } else {
     return HTNOWHERE;
   }
 
   // If the window can't be resized, there are no resize boundaries, just
   // window borders.
   return can_resize ? component : HTBORDER;
 }
 
 }  // namespace views