Eliminate ash::internal namespace

ash/accelerators/accelerator_filter_unittest.cc

Index: ash/accelerators/accelerator_filter_unittest.cc
diff --git a/ash/accelerators/accelerator_filter_unittest.cc b/ash/accelerators/accelerator_filter_unittest.cc
index c1a70549b9e51450331d2faf634d0b88b2d6a70e..2aa7ba0923882b5695111d1ae54bab390e604c5a 100644
--- a/ash/accelerators/accelerator_filter_unittest.cc
+++ b/ash/accelerators/accelerator_filter_unittest.cc
@@ -86,7 +86,7 @@ TEST_F(AcceleratorFilterTest, TestCapsLockMask) {
 // Tests if special hardware keys like brightness and volume are consumed as
 // expected by the shell.
 TEST_F(AcceleratorFilterTest, CanConsumeSystemKeys) {
-  internal::AcceleratorFilter filter;
+  AcceleratorFilter filter;
 
   // Normal keys are not consumed.
   ui::KeyEvent press_a(ui::ET_KEY_PRESSED, ui::VKEY_A, ui::EF_NONE, false);