Make browser windows override_redirect when dragging tabs.

chrome/browser/ui/views/frame/browser_frame.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.h"
 
 #include "base/debug/leak_annotations.h"
 #include "base/i18n/rtl.h"
 #include "chrome/browser/app_mode/app_mode_utils.h"
 #include "chrome/browser/themes/theme_service.h"
@@ skipping 50 matching lines @@
   static const gfx::FontList* title_font_list = new gfx::FontList();
   ANNOTATE_LEAKING_OBJECT_PTR(title_font_list);
   return *title_font_list;
 }
 
 void BrowserFrame::InitBrowserFrame() {
   native_browser_frame_ =
       NativeBrowserFrameFactory::CreateNativeBrowserFrame(this, browser_view_);
   views::Widget::InitParams params = native_browser_frame_->GetWidgetParams();
   params.delegate = browser_view_;
+  if (browser_view_->browser()->is_being_dragged()) {
+    params.type = views::Widget::InitParams::TYPE_DRAG;

[Daniel Erat, 2016/01/19 20:36:22]

does this cause problems on other platforms?

[stapelberg, 2016/01/20 13:31:09]

I don’t know, I only use Linux. Do we have someone who could test this for us?

[Daniel Erat, 2016/01/23 02:18:06]

i'm in the same boat. i don't really work on chrome anymore, but when i did, i'd
usually just walk around and throw myself at the mercy of random windows and mac
developers. :-P

+  }
   if (browser_view_->browser()->is_type_tabbed()) {
     // Typed panel/popup can only return a size once the widget has been
     // created.
     chrome::GetSavedWindowBoundsAndShowState(browser_view_->browser(),
                                              &params.bounds,
                                              &params.show_state);
   }
   Init(params);
 
   if (!native_browser_frame_->UsesNativeSystemMenu()) {
@@ skipping 162 matching lines @@
 
 #if defined(FRAME_AVATAR_BUTTON)
 NewAvatarButton* BrowserFrame::GetNewAvatarMenuButton() {
   return browser_frame_view_->new_avatar_button();
 }
 #endif
 
 bool BrowserFrame::ShouldLeaveOffsetNearTopBorder() {
   return !IsMaximized();
 }