Remove using directives ("using namespace x") from ash/.

Bug: 82078
Change-Id: Iaa5d62ebb39e94c7a83b627c4ae75534e7b7223f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1820016
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#699369}

ash/assistant/assistant_setup_controller.cc

@@ -44,13 +44,11 @@ void AssistantSetupController::OnAssistantControllerDestroying() {
 void AssistantSetupController::OnDeepLinkReceived(
     assistant::util::DeepLinkType type,
     const std::map<std::string, std::string>& params) {
-  using namespace assistant::util;
-
-  if (type != DeepLinkType::kOnboarding)
+  if (type != assistant::util::DeepLinkType::kOnboarding)
     return;
 
-  base::Optional<bool> relaunch =
-      GetDeepLinkParamAsBool(params, DeepLinkParam::kRelaunch);
+  base::Optional<bool> relaunch = assistant::util::GetDeepLinkParamAsBool(
+      params, assistant::util::DeepLinkParam::kRelaunch);
 
   StartOnboarding(relaunch.value_or(false));
 }

ash/login/login_screen_controller_unittest.cc

@@ -22,8 +22,8 @@
 #include "components/prefs/pref_service.h"
 #include "components/session_manager/session_manager_types.h"
 
+using session_manager::SessionState;
 using ::testing::_;
-using namespace session_manager;
 
 namespace ash {
 

ash/system/palette/palette_tool_manager_unittest.cc

@@ -12,7 +12,7 @@
 #include "base/memory/ptr_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using namespace ash;
+namespace ash {
 
 namespace {
 
@@ -141,3 +141,5 @@ TEST_F(PaletteToolManagerTest, MultipleToolsActivateDeactivate) {
   EXPECT_FALSE(action_2->enabled());
   palette_tool_manager_->DeactivateTool(action_1->GetToolId());
 }
+
+}  // namespace ash
\ No newline at end of file