Revert of Monitor the system native frame color on Win 10.

chrome/browser/themes/theme_service_factory.cc

Index: chrome/browser/themes/theme_service_factory.cc
diff --git a/chrome/browser/themes/theme_service_factory.cc b/chrome/browser/themes/theme_service_factory.cc
index 3e72af0e2ad096ec6f5a1ae7d6dc3028e5b1d4af..9f7ebbd67b0edb3020444a845588359fcf68e7a2 100644
--- a/chrome/browser/themes/theme_service_factory.cc
+++ b/chrome/browser/themes/theme_service_factory.cc
@@ -16,9 +16,7 @@
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_registry_factory.h"
 
-#if defined(OS_WIN)
-#include "chrome/browser/themes/theme_service_win.h"
-#elif defined(USE_AURA) && defined(USE_X11) && !defined(OS_CHROMEOS)
+#if defined(USE_AURA) && defined(USE_X11) && !defined(OS_CHROMEOS)
 #include "chrome/browser/themes/theme_service_aurax11.h"
 #include "ui/views/linux_ui/linux_ui.h"
 #endif
@@ -57,9 +55,7 @@
 KeyedService* ThemeServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   ThemeService* provider = NULL;
-#if defined(OS_WIN)
-  provider = new ThemeServiceWin;
-#elif defined(USE_AURA) && defined(USE_X11) && !defined(OS_CHROMEOS)
+#if defined(USE_AURA) && defined(USE_X11) && !defined(OS_CHROMEOS)
   provider = new ThemeServiceAuraX11;
 #else
   provider = new ThemeService;