[WebView] Remove more redundant classes

android_webview/BUILD.gn

Index: android_webview/BUILD.gn
diff --git a/android_webview/BUILD.gn b/android_webview/BUILD.gn
index 0cd1f7cf8e5a879cc51925fa18b8b6ee64ccc3ab..32f62f82fcb9a71933160247f2de8dd6e1af5df2 100644
--- a/android_webview/BUILD.gn
+++ b/android_webview/BUILD.gn
@@ -473,13 +473,8 @@ source_set("common") {
     "browser/aw_gl_surface.h",
     "browser/aw_http_auth_handler.cc",
     "browser/aw_http_auth_handler.h",
-    "browser/aw_http_auth_handler_base.cc",
-    "browser/aw_http_auth_handler_base.h",
     "browser/aw_javascript_dialog_manager.cc",
     "browser/aw_javascript_dialog_manager.h",
-    "browser/aw_locale_manager.h",
-    "browser/aw_locale_manager_impl.cc",
-    "browser/aw_locale_manager_impl.h",
     "browser/aw_login_delegate.cc",
     "browser/aw_login_delegate.h",
     "browser/aw_media_url_interceptor.cc",
@@ -531,10 +526,6 @@ source_set("common") {
     "browser/aw_web_contents_delegate.h",
     "browser/aw_web_contents_view_delegate.cc",
     "browser/aw_web_contents_view_delegate.h",
-    "browser/aw_web_preferences_populater.cc",
-    "browser/aw_web_preferences_populater.h",
-    "browser/aw_web_preferences_populater_impl.cc",
-    "browser/aw_web_preferences_populater_impl.h",
     "browser/aw_web_resource_response_impl.cc",
     "browser/aw_web_resource_response_impl.h",
     "browser/browser_view_renderer.cc",