Random wm frame painting fixes

mash/task_viewer/task_viewer.cc

 // Copyright 2015 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 "mash/task_viewer/task_viewer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 70 matching lines @@
     std::string name;
   };
 
 
   // Overridden from views::WidgetDelegate:
   views::View* GetContentsView() override { return this; }
   base::string16 GetWindowTitle() const override {
     // TODO(beng): use resources.
     return base::ASCIIToUTF16("Tasks");
   }
+  bool CanResize() const override { return true; }
+  bool CanMaximize() const override { return true; }
+  bool CanMinimize() const override { return true; }
 
   gfx::ImageSkia GetWindowAppIcon() override {
     // TODO(jamescook): Create a new .pak file for this app and make a custom
     // icon, perhaps one that looks like the Chrome OS task viewer icon.
     ResourceBundle& rb = ResourceBundle::GetSharedInstance();
     return *rb.GetImageSkiaNamed(IDR_NOTIFICATION_SETTINGS);
   }
 
   // Overridden from views::View:
   void Layout() override {
@@ skipping 186 matching lines @@
 
   TaskViewerContents* task_viewer = new TaskViewerContents(
       std::move(request), std::move(catalog));
   views::Widget* window = views::Widget::CreateWindowWithContextAndBounds(
       task_viewer, nullptr, gfx::Rect(10, 10, 500, 500));
   window->Show();
 }
 
 }  // namespace task_viewer
 }  // namespace main