Remove InlineLoginHandlerChromeOS and exclude InlineLoginUI from CrOS build.

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 17fd9dc5e8fb3ef810a62d040eba08b172178da1..6c6432985a908f244ce4790dff7094a35b84f7d0 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -1032,6 +1032,9 @@ if (!is_android) {
         # chromeos does not use cross-platform panels
         "../browser/ui/panels/panel_extension_browsertest.cc",
 
+        # inline login UI is disabled on chromeos
+        "../browser/ui/webui/signin/inline_login_ui_browsertest.cc",
+
         # chromeos does not use the desktop user manager
         "../browser/ui/webui/signin/user_manager_ui_browsertest.cc",
       ]