GestureLongPress should be able to invoke BUBBLE_MODE_FAST_USER_SWITCH.

chrome/browser/ui/views/frame/glass_browser_frame_view.cc

 // 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.
 
 #include "chrome/browser/ui/views/frame/glass_browser_frame_view.h"
 
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/windows_version.h"
 #include "chrome/app/chrome_command_ids.h"
@@ skipping 274 matching lines @@
 
 ///////////////////////////////////////////////////////////////////////////////
 // GlassBrowserFrameView, protected:
 
 // views::ButtonListener:
 void GlassBrowserFrameView::ButtonPressed(views::Button* sender,
                                           const ui::Event& event) {
   if (sender == new_avatar_button()) {
     BrowserWindow::AvatarBubbleMode mode =
         BrowserWindow::AVATAR_BUBBLE_MODE_DEFAULT;
-    if (event.IsMouseEvent() &&
-        static_cast<const ui::MouseEvent&>(event).IsRightMouseButton()) {
+    if ((event.IsMouseEvent() &&
+         static_cast<const ui::MouseEvent&>(event).IsRightMouseButton()) ||
+        (event.type() == ui::ET_GESTURE_LONG_PRESS)) {
       mode = BrowserWindow::AVATAR_BUBBLE_MODE_FAST_USER_SWITCH;
     }
     browser_view()->ShowAvatarBubbleFromAvatarButton(
         mode,
         signin::ManageAccountsParams());
   }
 }
 
 // BrowserNonClientFrameView:
 void GlassBrowserFrameView::UpdateNewAvatarButtonImpl() {
@@ skipping 316 matching lines @@
   static bool initialized = false;
   if (!initialized) {
     for (int i = 0; i < kThrobberIconCount; ++i) {
       throbber_icons_[i] =
           ui::LoadThemeIconFromResourcesDataDLL(IDI_THROBBER_01 + i);
       DCHECK(throbber_icons_[i]);
     }
     initialized = true;
   }
 }