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

chrome/browser/ui/cocoa/validation_message_bubble_cocoa.mm

 // Copyright (c) 2013 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/cocoa/validation_message_bubble_cocoa.h"
 
 #include <memory>
 
 #include "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 29 matching lines @@
 
   base::scoped_nsobject<InfoBubbleWindow> window(
       [[InfoBubbleWindow alloc] initWithContentRect:
               NSMakeRect(0, 0, kWindowInitialWidth, kWindowInitialHeight)
                                           styleMask:NSBorderlessWindowMask
                                             backing:NSBackingStoreBuffered
                                               defer:NO]);
   if ((self = [super initWithWindow:window.get()
                        parentWindow:parentWindow
                          anchoredAt:anchorPoint])) {
-    [[self bubble] setArrowLocation:info_bubble::kTopLeft];
+    [[self bubble] setArrowLocation:info_bubble::kTopLeading];
     self.shouldOpenAsKeyWindow = NO;
 
     NSView* contentView = [ValidationMessageBubbleController
         constructContentView:mainText subText:subText];
     [[window contentView] addSubview:contentView];
     NSRect contentFrame = [contentView frame];
     NSRect windowFrame = [window frame];
     windowFrame.size.width = NSWidth(contentFrame) + kWindowPadding * 2;
     windowFrame.size.height = NSHeight(contentFrame) + kWindowPadding * 2
         + info_bubble::kBubbleArrowHeight;
@@ skipping 111 matching lines @@
 void ValidationMessageBubbleCocoa::SetPositionRelativeToAnchor(
     content::RenderWidgetHost* widget_host,
     const gfx::Rect& anchor_in_root_view) {
   [controller_ setAnchorPoint:GetAnchorPoint(widget_host, anchor_in_root_view)];
 }
 
 void ValidationMessageBubbleCocoa::CloseValidationMessage() {
   [controller_ close];
   delete this;
 }