Clean up most of the ChromeOS headers in non-ChromeOS build

chrome/browser/extensions/api/page_capture/page_capture_apitest.cc

Index: chrome/browser/extensions/api/page_capture/page_capture_apitest.cc
diff --git a/chrome/browser/extensions/api/page_capture/page_capture_apitest.cc b/chrome/browser/extensions/api/page_capture/page_capture_apitest.cc
index 8cb98ee50adad108e91e12ad7e60eef755597554..f00d182cd545b10e299465891ec7ddffe80c01d7 100644
--- a/chrome/browser/extensions/api/page_capture/page_capture_apitest.cc
+++ b/chrome/browser/extensions/api/page_capture/page_capture_apitest.cc
@@ -8,12 +8,15 @@
 #include "chrome/browser/extensions/api/page_capture/page_capture_api.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/common/chrome_switches.h"
-#include "chromeos/login/login_state.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/test_utils.h"
 #include "extensions/browser/extension_dialog_auto_confirm.h"
 #include "net/dns/mock_host_resolver.h"
 
+#if defined(OS_CHROMEOS)
+#include "chromeos/login/login_state.h"
+#endif  // defined(OS_CHROMEOS)
+
 using extensions::PageCaptureSaveAsMHTMLFunction;
 using extensions::ScopedTestDialogAutoConfirm;