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

chrome/browser/ui/cocoa/bookmarks/bookmark_bubble_controller.mm

 // Copyright (c) 2012 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/bookmarks/bookmark_bubble_controller.h"
 
 #include "base/mac/bundle_locations.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/browser/ui/bookmarks/bookmark_bubble_observer.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 126 matching lines @@
 
 // Override -[BaseBubbleController showWindow:] to tweak bubble location and
 // set up UI elements.
 - (void)showWindow:(id)sender {
   NSWindow* window = [self window];  // Force load the NIB.
   NSWindow* parentWindow = self.parentWindow;
   BrowserWindowController* bwc =
       [BrowserWindowController browserWindowControllerForWindow:parentWindow];
 
   InfoBubbleView* bubble = self.bubble;
-  [bubble setArrowLocation:info_bubble::kTopRight];
+  [bubble setArrowLocation:info_bubble::kTopTrailing];
 
   // Insure decent positioning even in the absence of a browser controller,
   // which will occur for some unit tests.
+
   NSPoint arrowTip = bwc ? [bwc bookmarkBubblePoint] :
       NSMakePoint([window frame].size.width, [window frame].size.height);
   arrowTip = ui::ConvertPointFromWindowToScreen(parentWindow, arrowTip);
   NSPoint bubbleArrowTip = [bubble arrowTip];
   bubbleArrowTip = [bubble convertPoint:bubbleArrowTip toView:nil];
   arrowTip.y -= bubbleArrowTip.y;
   arrowTip.x -= bubbleArrowTip.x;
   [window setFrameOrigin:arrowTip];
 
   // Default is IDS_BOOKMARK_BUBBLE_PAGE_BOOKMARK; "Bookmark".
@@ skipping 215 matching lines @@
   NSInteger idx = [menu indexOfItemWithRepresentedObject:parentValue];
   DCHECK(idx != -1);
   [folderPopUpButton_ selectItemAtIndex:idx];
 }
 
 - (NSPopUpButton*)folderPopUpButton {
   return folderPopUpButton_;
 }
 
 @end  // implementation BookmarkBubbleController(ExposedForUnitTesting)