Removal of unnecessary views:: and fix comment

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.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 "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h"
 
 #include <X11/extensions/shape.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xregion.h>
@@ skipping 229 matching lines @@
   } else {
     ReleaseCapture();
   }
 
   desktop_native_widget_aura_->HandleActivationChanged(active);
 
   native_widget_delegate_->AsWidget()->GetRootView()->SchedulePaint();
 }
 
 void DesktopWindowTreeHostX11::AddObserver(
-    views::DesktopWindowTreeHostObserverX11* observer) {
+    DesktopWindowTreeHostObserverX11* observer) {
   observer_list_.AddObserver(observer);
 }
 
 void DesktopWindowTreeHostX11::RemoveObserver(
-    views::DesktopWindowTreeHostObserverX11* observer) {
+    DesktopWindowTreeHostObserverX11* observer) {
   observer_list_.RemoveObserver(observer);
 }
 
 void DesktopWindowTreeHostX11::SwapNonClientEventHandler(
     std::unique_ptr<ui::EventHandler> handler) {
   wm::CompoundEventFilter* compound_event_filter =
       desktop_native_widget_aura_->root_window_event_filter();
   if (x11_non_client_event_filter_)
     compound_event_filter->RemoveHandler(x11_non_client_event_filter_.get());
   compound_event_filter->AddHandler(handler.get());
@@ skipping 1327 matching lines @@
   if (custom_window_shape_) {
     XShapeCombineRegion(xdisplay_, xwindow_, ShapeBounding, 0, 0,
                         window_shape_.get(), false);
     return;
   }
 
   window_shape_.reset();
 
   if (!IsMaximized() && !IsFullscreen()) {
     gfx::Path window_mask;
-    views::Widget* widget = native_widget_delegate_->AsWidget();
+    Widget* widget = native_widget_delegate_->AsWidget();
     if (widget->non_client_view()) {
       // Some frame views define a custom (non-rectangular) window mask. If
       // so, use it to define the window shape. If not, fall through.
       widget->non_client_view()->GetWindowMask(bounds_in_pixels_.size(),
                                                &window_mask);
       if (window_mask.countPoints() > 0) {
         window_shape_.reset(gfx::CreateRegionFromSkPath(window_mask));
         XShapeCombineRegion(xdisplay_, xwindow_, ShapeBounding, 0, 0,
                             window_shape_.get(), false);
         return;
@@ skipping 469 matching lines @@
 // static
 DesktopWindowTreeHost* DesktopWindowTreeHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura) {
   return new DesktopWindowTreeHostX11(native_widget_delegate,
                                       desktop_native_widget_aura);
 }
 
 // static
 ui::NativeTheme* DesktopWindowTreeHost::GetNativeTheme(aura::Window* window) {
-  const views::LinuxUI* linux_ui = views::LinuxUI::instance();
+  const LinuxUI* linux_ui = LinuxUI::instance();
   if (linux_ui) {
     ui::NativeTheme* native_theme = linux_ui->GetNativeTheme(window);
     if (native_theme)
       return native_theme;
   }
 
   return ui::NativeThemeAura::instance();
 }
 
 }  // namespace views