Add context to gfx::Screen calls in support of simultaneous desktop+ash

ash/keyboard_overlay/keyboard_overlay_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 "ash/keyboard_overlay/keyboard_overlay_view.h"
 
 #include "ash/keyboard_overlay/keyboard_overlay_delegate.h"
 #include "ash/shell.h"
 #include "base/utf_string_conversions.h"
 #include "content/public/browser/browser_context.h"
@@ skipping 13 matching lines @@
   ui::KeyboardCode key_code;
   int flags;
 } kCancelKeys[] = {
   { ui::VKEY_ESCAPE, ui::EF_NONE},
   { ui::VKEY_OEM_2, ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN },
   { ui::VKEY_OEM_2, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN },
 };
 
 }
 
+namespace ash {
+
 KeyboardOverlayView::KeyboardOverlayView(
     content::BrowserContext* context,
     WebDialogDelegate* delegate,
     WebContentsHandler* handler)
     : views::WebDialogView(context, delegate, handler) {
 }
 
 KeyboardOverlayView::~KeyboardOverlayView() {
 }
 
 void KeyboardOverlayView::Cancel() {
-  ash::Shell::GetInstance()->overlay_filter()->Deactivate();
+  Shell::GetInstance()->overlay_filter()->Deactivate();
   views::Widget* widget = GetWidget();
   if (widget)
     widget->Close();
 }
 
 bool KeyboardOverlayView::IsCancelingKeyEvent(ui::KeyEvent* event) {
   if (event->type() != ui::ET_KEY_PRESSED)
     return false;
   // Ignore the caps lock state.
   const int flags = (event->flags() & ~ui::EF_CAPS_LOCK_DOWN);
@@ skipping 12 matching lines @@
 void KeyboardOverlayView::ShowDialog(
     content::BrowserContext* context,
     WebContentsHandler* handler,
     const GURL& url) {
   KeyboardOverlayDelegate* delegate = new KeyboardOverlayDelegate(
       l10n_util::GetStringUTF16(IDS_ASH_KEYBOARD_OVERLAY_TITLE), url);
   KeyboardOverlayView* view =
       new KeyboardOverlayView(context, delegate, handler);
   delegate->Show(view);
 
-  ash::Shell::GetInstance()->overlay_filter()->Activate(view);
+  Shell::GetInstance()->overlay_filter()->Activate(view);
 }
 
 void KeyboardOverlayView::WindowClosing() {
   Cancel();
 }
+
+}  // namespace ash