Bring up fast user switcher on right-click of the avatar menu on Mac.

chrome/browser/ui/cocoa/profiles/avatar_base_controller.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/profiles/avatar_base_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile_info_cache_observer.h"
@@ skipping 15 matching lines @@
 
 // Space between the avatar icon and the avatar menu bubble.
 const CGFloat kMenuYOffsetAdjust = 1.0;
 // Offset needed to align the edge of the avatar bubble with the edge of the
 // avatar button.
 const CGFloat kMenuXOffsetAdjust = 2.0;
 
 @interface AvatarBaseController (Private)
 // Shows the avatar bubble.
 - (IBAction)buttonClicked:(id)sender;
+- (IBAction)buttonRightClicked:(id)sender;
 
 - (void)bubbleWillClose:(NSNotification*)notif;
 
 // Updates the profile name displayed by the avatar button. If |layoutParent| is
 // yes, then the BrowserWindowController is notified to relayout the subviews,
 // as the button needs to be repositioned.
 - (void)updateAvatarButtonAndLayoutParent:(BOOL)layoutParent;
 
 // Displays an error icon if any accounts associated with this profile have an
 // auth error.
@@ skipping 160 matching lines @@
            object:[menuController_ window]];
   [menuController_ showWindow:self];
 
   ProfileMetrics::LogProfileOpenMethod(ProfileMetrics::ICON_AVATAR_BUBBLE);
 }
 
 - (IBAction)buttonClicked:(id)sender {
   BrowserWindow::AvatarBubbleMode mode =
       BrowserWindow::AVATAR_BUBBLE_MODE_DEFAULT;
 
-  if ([NSEvent modifierFlags] & NSCommandKeyMask)
-    mode = BrowserWindow::AVATAR_BUBBLE_MODE_FAST_USER_SWITCH;
+  [self showAvatarBubbleAnchoredAt:button_
+                          withMode:mode
+                   withServiceType:signin::GAIA_SERVICE_TYPE_NONE];
+}
+
+- (IBAction)buttonRightClicked:(id)sender {
+  BrowserWindow::AvatarBubbleMode mode =
+      BrowserWindow::AVATAR_BUBBLE_MODE_FAST_USER_SWITCH;
 
   [self showAvatarBubbleAnchoredAt:button_
                           withMode:mode
                    withServiceType:signin::GAIA_SERVICE_TYPE_NONE];
 }
 
 - (void)bubbleWillClose:(NSNotification*)notif {
   NSWindowController* wc =
       [browser_->window()->GetNativeWindow() windowController];
   if ([wc isKindOfClass:[BrowserWindowController class]]) {
     [static_cast<BrowserWindowController*>(wc)
         releaseBarVisibilityForOwner:self withAnimation:YES delay:NO];
   }
   menuController_ = nil;
 }
 
 - (void)updateAvatarButtonAndLayoutParent:(BOOL)layoutParent {
   NOTREACHED();
 }
 
 - (void)updateErrorStatus:(BOOL)hasError {
 }
 
 - (BaseBubbleController*)menuController {
   return menuController_;
 }
 
 @end