MacViews: fix bubble direction in RTL.

ui/views/bubble/bubble_dialog_delegate.cc

 // 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/bubble/bubble_dialog_delegate.h"
 
 #include "build/build_config.h"
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/color_utils.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/native_theme/native_theme.h"
 #include "ui/views/bubble/bubble_frame_view.h"
 #include "ui/views/focus/view_storage.h"
 #include "ui/views/layout/layout_constants.h"
+#include "ui/views/style/platform_style.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_observer.h"
 #include "ui/views/window/dialog_client_view.h"
 
 #if defined(OS_WIN)
 #include "ui/base/win/shell.h"
 #endif
 
 namespace views {
 
@@ skipping 174 matching lines @@
 
 BubbleDialogDelegateView::BubbleDialogDelegateView()
     : BubbleDialogDelegateView(nullptr, BubbleBorder::TOP_LEFT) {}
 
 BubbleDialogDelegateView::BubbleDialogDelegateView(View* anchor_view,
                                                    BubbleBorder::Arrow arrow)
     : close_on_deactivate_(true),
       anchor_view_storage_id_(ViewStorage::GetInstance()->CreateStorageID()),
       anchor_widget_(NULL),
       arrow_(arrow),
-      mirror_arrow_in_rtl_(true),
+      mirror_arrow_in_rtl_(PlatformStyle::kMirrorBubbleArrowInRTLByDefault),
       shadow_(BubbleBorder::SMALL_SHADOW),
       color_explicitly_set_(false),
       margins_(kPanelVertMargin,
                kPanelHorizMargin,
                kPanelVertMargin,
                kPanelHorizMargin),
       accept_events_(true),
       border_accepts_events_(true),
       adjust_if_offscreen_(true),
       parent_window_(NULL) {
@@ skipping 97 matching lines @@
   // http://crbug.com/474622 for details.
   if (widget == GetWidget() && visible) {
     ui::AXNodeData node_data;
     GetAccessibleNodeData(&node_data);
     if (node_data.role == ui::AX_ROLE_ALERT_DIALOG)
       NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
   }
 }
 
 }  // namespace views