Revert of Linux Aura: Make tab dragging great again

ui/views/widget/desktop_aura/x11_desktop_window_move_client_managed.cc

Index: ui/views/widget/desktop_aura/x11_desktop_window_move_client_managed.cc
diff --git a/ui/views/widget/desktop_aura/x11_desktop_window_move_client_managed.cc b/ui/views/widget/desktop_aura/x11_desktop_window_move_client_managed.cc
deleted file mode 100644
index 19ebb04a830e35465ffbba1fd21100b4905c9a0a..0000000000000000000000000000000000000000
--- a/ui/views/widget/desktop_aura/x11_desktop_window_move_client_managed.cc
+++ /dev/null
@@ -1,120 +0,0 @@
-// Copyright 2016 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 "ui/views/widget/desktop_aura/x11_desktop_window_move_client_managed.h"
-
-#include <X11/extensions/XInput2.h>
-#include <X11/Xlib.h>
-
-#include "base/run_loop.h"
-#include "ui/aura/window.h"
-#include "ui/aura/window_tree_host.h"
-#include "ui/base/x/x11_util.h"
-#include "ui/events/event_utils.h"
-#include "ui/events/platform/platform_event_source.h"
-#include "ui/events/platform/scoped_event_dispatcher.h"
-#include "ui/views/widget/desktop_aura/x11_pointer_grab.h"
-
-namespace views {
-
-namespace {
-
-bool IsButtonReleaseEvent(XEvent* xev) {
-  if (xev->type == ButtonRelease)
-    return xev->xbutton.button == Button1;
-  if (xev->type == GenericEvent) {
-    XIDeviceEvent* xievent = static_cast<XIDeviceEvent*>(xev->xcookie.data);
-    if (xievent->evtype == XI_RawButtonRelease)
-      return ui::EventButtonFromNative(xev) == Button1;
-  }
-  return false;
-}
-
-void SelectButtonReleaseEvents(bool select) {
-  unsigned char mask[XIMaskLen(XI_LASTEVENT)];
-  memset(mask, 0, sizeof(mask));
-  if (select)
-    XISetMask(mask, XI_RawButtonRelease);
-  XIEventMask evmask;
-  evmask.deviceid = XIAllMasterDevices;
-  evmask.mask_len = sizeof(mask);
-  evmask.mask = mask;
-  XDisplay* display = gfx::GetXDisplay();
-  XISelectEvents(display, DefaultRootWindow(display), &evmask, 1);
-}
-
-}  // anonymous namespace
-
-X11DesktopWindowMoveClientManaged::X11DesktopWindowMoveClientManaged()
-    : weak_factory_(this) {}
-X11DesktopWindowMoveClientManaged::~X11DesktopWindowMoveClientManaged() {}
-
-bool X11DesktopWindowMoveClientManaged::CanDispatchEvent(
-    const ui::PlatformEvent& event) {
-  return in_move_loop_;
-}
-
-uint32_t X11DesktopWindowMoveClientManaged::DispatchEvent(
-    const ui::PlatformEvent& event) {
-  DCHECK(base::MessageLoopForUI::IsCurrent());
-
-  XEvent* xev = event;
-
-  // This method processes all events while the move loop is active.
-  if (!in_move_loop_)
-    return ui::POST_DISPATCH_PERFORM_DEFAULT;
-
-  if (IsButtonReleaseEvent(xev)) {
-    EndMoveLoop();
-    return ui::POST_DISPATCH_NONE;
-  }
-  return ui::POST_DISPATCH_PERFORM_DEFAULT;
-}
-
-aura::client::WindowMoveResult X11DesktopWindowMoveClientManaged::RunMoveLoop(
-    aura::Window* window,
-    const gfx::Vector2d& drag_offset,
-    aura::client::WindowMoveSource move_source) {
-  auto screen_location = window->GetBoundsInScreen().origin() + drag_offset;
-  window_ = window->GetHost()->GetAcceleratedWidget();
-
-  SelectButtonReleaseEvents(true);
-
-  window->ReleaseCapture();
-  UngrabPointer();
-  MoveResizeManagedWindow(window_, screen_location, ui::NetWmMoveResize::MOVE);
-
-  std::unique_ptr<ui::ScopedEventDispatcher> old_dispatcher =
-      std::move(nested_dispatcher_);
-  nested_dispatcher_ =
-      ui::PlatformEventSource::GetInstance()->OverrideDispatcher(this);
-
-  base::WeakPtr<X11DesktopWindowMoveClientManaged> alive(
-      weak_factory_.GetWeakPtr());
-
-  in_move_loop_ = true;
-  base::MessageLoopForUI* loop = base::MessageLoopForUI::current();
-  base::MessageLoop::ScopedNestableTaskAllower allow_nested(loop);
-  base::RunLoop run_loop;
-  quit_closure_ = run_loop.QuitClosure();
-  run_loop.Run();
-
-  if (!alive)
-    return aura::client::MOVE_CANCELED;
-
-  nested_dispatcher_ = std::move(old_dispatcher);
-  return aura::client::MOVE_SUCCESSFUL;
-}
-
-void X11DesktopWindowMoveClientManaged::EndMoveLoop() {
-  if (!in_move_loop_)
-    return;
-
-  MoveResizeManagedWindow(window_, gfx::Point(), ui::NetWmMoveResize::CANCEL);
-  SelectButtonReleaseEvents(false);
-
-  quit_closure_.Run();
-}
-
-}  // namespace views