Fix crash when high contrast themes are enabled (issue #2508)

libcef/browser/browser_main.cc

@@ -33,6 +33,7 @@
 #include "extensions/common/constants.h"
 #include "net/base/net_module.h"
 #include "services/service_manager/embedder/result_codes.h"
+#include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/resource/resource_bundle.h"
 
 #if defined(USE_AURA)
@@ -150,6 +151,8 @@ void CefBrowserMainParts::PreMainMessageLoopRun() {
   display::Screen::SetScreenInstance(views::CreateDesktopScreen());
 #endif
 
+  ui::MaterialDesignController::Initialize();
+
   // CEF's profile is a BrowserContext.
   PreProfileInit();