[WebView] Remove more redundant classes

android_webview/lib/main/aw_main_delegate.cc

Index: android_webview/lib/main/aw_main_delegate.cc
diff --git a/android_webview/lib/main/aw_main_delegate.cc b/android_webview/lib/main/aw_main_delegate.cc
index 0dbed8b02e8a51b7db2e9bb6767a4f7deac9df93..97577d6304e35fb102b727de90d2028dc13340c2 100644
--- a/android_webview/lib/main/aw_main_delegate.cc
+++ b/android_webview/lib/main/aw_main_delegate.cc
@@ -7,12 +7,12 @@
 #include <memory>
 
 #include "android_webview/browser/aw_content_browser_client.h"
-#include "android_webview/browser/aw_locale_manager_impl.h"
+#include "android_webview/browser/aw_locale_manager.h"
 #include "android_webview/browser/aw_media_url_interceptor.h"
 #include "android_webview/browser/aw_quota_manager_bridge_impl.h"
 #include "android_webview/browser/aw_safe_browsing_config_helper.h"
 #include "android_webview/browser/aw_web_contents_view_delegate.h"
-#include "android_webview/browser/aw_web_preferences_populater_impl.h"
+#include "android_webview/browser/aw_web_preferences_populater.h"
 #include "android_webview/browser/browser_view_renderer.h"
 #include "android_webview/browser/command_line_helper.h"
 #include "android_webview/browser/deferred_gpu_command_service.h"
@@ -278,12 +278,4 @@ content::WebContentsViewDelegate* AwMainDelegate::CreateViewDelegate(
   return AwWebContentsViewDelegate::Create(web_contents);
 }
 
-AwWebPreferencesPopulater* AwMainDelegate::CreateWebPreferencesPopulater() {
-  return new AwWebPreferencesPopulaterImpl();
-}
-
-AwLocaleManager* AwMainDelegate::CreateAwLocaleManager() {
-  return new AwLocaleManagerImpl();
-}
-
 }  // namespace android_webview