Update profile switcher button on Linux.

chrome/browser/ui/views/profiles/new_avatar_button.h

Index: chrome/browser/ui/views/profiles/new_avatar_button.h
diff --git a/chrome/browser/ui/views/profiles/new_avatar_button.h b/chrome/browser/ui/views/profiles/new_avatar_button.h
index 5cbcb617359b115af693793aa9c098f77ebba766..b8a81c293e8187c7c7d33903cc4b0aaa0a783c04 100644
--- a/chrome/browser/ui/views/profiles/new_avatar_button.h
+++ b/chrome/browser/ui/views/profiles/new_avatar_button.h
@@ -11,6 +11,7 @@
 #include "chrome/browser/ui/avatar_button_error_controller_delegate.h"
 #include "chrome/browser/ui/views/profiles/avatar_button_style.h"
 #include "ui/views/controls/button/label_button.h"
+#include "ui/views/widget/widget_observer.h"
 
 class AvatarButtonDelegate;
 class Profile;
@@ -18,19 +19,21 @@ class Profile;
 // Avatar button that displays the active profile's name in the caption area.
 class NewAvatarButton : public views::LabelButton,
                         public AvatarButtonErrorControllerDelegate,
-                        public ProfileAttributesStorage::Observer {
+                        public ProfileAttributesStorage::Observer,
+                        public views::WidgetObserver {
  public:
   NewAvatarButton(AvatarButtonDelegate* delegate,
                   AvatarButtonStyle button_style,
                   Profile* profile);
   ~NewAvatarButton() override;
 
-  // Views::LabelButton
+  // views::LabelButton
   bool OnMousePressed(const ui::MouseEvent& event) override;
   void OnMouseReleased(const ui::MouseEvent& event) override;
-
-  // Views
   void OnGestureEvent(ui::GestureEvent* event) override;
+  SkColor GetInkDropBaseColor() const override;
+  std::unique_ptr<views::InkDropMask> CreateInkDropMask() const override;
+  void NotifyClick(const ui::Event& event) override;
 
  private:
   friend class ProfileChooserViewExtensionsTest;
@@ -47,6 +50,9 @@ class NewAvatarButton : public views::LabelButton,
   void OnProfileSupervisedUserIdChanged(
       const base::FilePath& profile_path) override;
 
+  // views::WidgetObserver
+  void OnWidgetClosing(views::Widget* widget) override;

[Peter Kasting, 2017/04/27 02:13:18]

Nit: Per recent chromium-dev discussion, make overrides have same visibility as
in original class

(Though in this case the best way to do that would be to also make the methods
above be public)

+
   // Called when the profile info cache or signin/sync error has changed, which
   // means we might have to update the icon/text of the button.
   void Update();