Eliminate ash::internal namespace

ash/display/projecting_observer_chromeos_unittest.cc

Index: ash/display/projecting_observer_chromeos_unittest.cc
diff --git a/ash/display/projecting_observer_chromeos_unittest.cc b/ash/display/projecting_observer_chromeos_unittest.cc
index 16d969446caccdcf038e7a2c7c2e224c205a046d..a6c1d2053e2dcdee8100c12d7daf8daf76d8fa58 100644
--- a/ash/display/projecting_observer_chromeos_unittest.cc
+++ b/ash/display/projecting_observer_chromeos_unittest.cc
@@ -11,9 +11,6 @@
 #include "ui/display/chromeos/test/test_display_snapshot.h"
 
 namespace ash {
-
-namespace internal {
-
 namespace {
 
 ui::TestDisplaySnapshot* CreateInternalSnapshot() {
@@ -192,6 +189,4 @@ TEST_F(ProjectingObserverTest,
   EXPECT_FALSE(fake_power_client_->is_projecting());
 }
 
-}  // namespace internal
-
 }  // namespace ash