[Mac] Make bubble arrow location/position RTL-aware

chrome/browser/ui/cocoa/extensions/extension_action_platform_delegate_cocoa.mm

 // Copyright 2014 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.
 
 #import "chrome/browser/ui/cocoa/extensions/extension_action_platform_delegate_cocoa.h"
 
 #include <string>
 #include <utility>
 
 #include "base/logging.h"
@@ skipping 59 matching lines @@
 
 void ExtensionActionPlatformDelegateCocoa::ShowPopup(
     std::unique_ptr<extensions::ExtensionViewHost> host,
     bool grant_tab_permissions,
     ExtensionActionViewController::PopupShowAction show_action) {
   BOOL devMode =
       show_action == ExtensionActionViewController::SHOW_POPUP_AND_INSPECT;
   [ExtensionPopupController host:std::move(host)
                        inBrowser:controller_->browser()
                       anchoredAt:GetPopupPoint()
-                   arrowLocation:info_bubble::kTopRight
+                   arrowLocation:info_bubble::kTopTrailing
                          devMode:devMode];
 }
 
 void ExtensionActionPlatformDelegateCocoa::CloseOverflowMenu() {
   // If this was triggered by an action overflowed to the app menu, then the app
   // menu will be open. Close it before opening the popup.
   AppMenuController* appMenuController =
       [[[BrowserWindowController
           browserWindowControllerForWindow:
               controller_->browser()->window()->GetNativeWindow()]
@@ skipping 41 matching lines @@
           controller_->IsEnabled(
               controller_->view_delegate()->GetCurrentWebContents())) {
         controller_->ExecuteAction(true);
       }
       break;
     }
     default:
       NOTREACHED() << "Unexpected notification";
   }
 }