Reland: Remove DCHECK_IMPLIES/CHECK_IMPLIES.

ui/views/touchui/touch_selection_menu_runner_views.cc

 // Copyright 2015 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/touchui/touch_selection_menu_runner_views.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/aura/window.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 177 matching lines @@
   // Draw separator bars.
   for (int i = 0; i < child_count() - 1; ++i) {
     View* child = child_at(i);
     int x = child->bounds().right() + kSpacingBetweenButtons / 2;
     canvas->FillRect(gfx::Rect(x, 0, 1, child->height()),
                      kButtonSeparatorColor);
   }
 }
 
 void TouchSelectionMenuRunnerViews::Menu::WindowClosing() {
-  DCHECK_IMPLIES(owner_, owner_->menu_ == this);
+  DCHECK(!owner_ || owner_->menu_ == this);
   BubbleDelegateView::WindowClosing();
   if (owner_)
     owner_->menu_ = nullptr;
 }
 
 void TouchSelectionMenuRunnerViews::Menu::ButtonPressed(
     Button* sender,
     const ui::Event& event) {
   Close();
   if (sender->tag() != kEllipsesButtonTag)
@@ skipping 31 matching lines @@
   // Closing the menu will eventually delete the object.
   menu_->Close();
   menu_ = nullptr;
 }
 
 bool TouchSelectionMenuRunnerViews::IsRunning() const {
   return menu_ != nullptr;
 }
 
 }  // namespace views