macOS: Setting focus to the first profile in profile switcher

When opening the profile switcher menu using the shortcut (cmd-shift-m), the first
profile (other than the current one) in the list should be highlighted. This should
happens only when opening the menu with the keyboard (and not with the mouse).

This was done with Cocoa implementation: crrev.com/2638853003
It should have been done when moving the profile chooser menu to views-toolkit:
crrev.com/c/750901

Bug: 728141
Change-Id: I724d08ce626ec88144edabe7d928d8315606fd71
Reviewed-on: https://chromium-review.googlesource.com/771753
Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
Reviewed-by: Trent Apted <tapted@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517052}

chrome/browser/ui/cocoa/profiles/profile_chooser_bridge_views.mm

@@ -49,9 +49,12 @@ std::unique_ptr<ProfileChooserViewBridge> ShowProfileChooserViews(
   anchor_rect.Inset(kBubbleInsets);
   gfx::NativeView anchor_window =
       platform_util::GetViewForWindow(browser->window()->GetNativeWindow());
+  // Select the first other profile if the menu is opened by the keyboard
+  // shortcut.
+  bool is_source_keyboard = [[NSApp currentEvent] type] == NSKeyDown;
   ProfileChooserView::ShowBubble(
       bubble_view_mode, signin::ManageAccountsParams(), access_point, nullptr,
-      anchor_window, anchor_rect, browser, false);
+      anchor_window, anchor_rect, browser, is_source_keyboard);
   ProfileMetrics::LogProfileOpenMethod(ProfileMetrics::ICON_AVATAR_BUBBLE);
   std::unique_ptr<ProfileChooserViewBridge> bridge(new ProfileChooserViewBridge(
       avatar_base_controller, ProfileChooserView::GetCurrentBubbleWidget()));