Rename the aura_shell namespace to ash

ash/launcher/launcher_unittest.cc

 // Copyright (c) 2011 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/launcher/launcher.h"
 
 #include "ash/shell.h"
 #include "ash/test/aura_shell_test_base.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
-typedef aura_shell::test::AuraShellTestBase LauncherTest;
+typedef ash::test::AuraShellTestBase LauncherTest;
 
-namespace aura_shell {
+namespace ash {
 
 // Makes sure invoking SetStatusWidth on the launcher changes the size of the
 // LauncherView.
 TEST_F(LauncherTest, SetStatusWidth) {
   Launcher* launcher = Shell::GetInstance()->launcher();
   ASSERT_TRUE(launcher);
   views::View* launcher_view = launcher->widget()->GetContentsView();
   ASSERT_EQ(1, launcher_view->child_count());
   launcher_view = launcher_view->child_at(0);
 
   int total_width = launcher->widget()->GetWindowScreenBounds().width();
   ASSERT_GT(total_width, 0);
   launcher->SetStatusWidth(total_width / 2);
   EXPECT_EQ(total_width - total_width / 2, launcher_view->width());
 }
 
-}  // namespace aura_shell
+}  // namespace ash