X11: Use better visuals for OpenGL

content/browser/browser_main_loop.h

Index: content/browser/browser_main_loop.h
diff --git a/content/browser/browser_main_loop.h b/content/browser/browser_main_loop.h
index 78beaf09bf66ddef7e0c64ae85a5a7e810aa6d51..c9fe5ed75f64cf8035978b93174b777800ce7d56 100644
--- a/content/browser/browser_main_loop.h
+++ b/content/browser/browser_main_loop.h
@@ -86,6 +86,12 @@ class ScreenOrientationDelegate;
 class ScreenOrientationDelegate;
 #endif
 
+#if defined(USE_X11) && !defined(OS_CHROMEOS)
+namespace internal {
+class GpuDataManagerVisualProxy;
+}
+#endif
+
 // Implements the main browser loop stages called from BrowserMainRunner.
 // See comments in browser_main_parts.h for additional info.
 class CONTENT_EXPORT BrowserMainLoop {
@@ -254,6 +260,10 @@ class CONTENT_EXPORT BrowserMainLoop {
   // Members initialized in |PreCreateThreads()| -------------------------------
   // Torn down in ShutdownThreadsAndCleanUp.
   std::unique_ptr<base::MemoryPressureMonitor> memory_pressure_monitor_;
+#if defined(USE_X11) && !(OS_CHROMEOS)
+  std::unique_ptr<internal::GpuDataManagerVisualProxy>
+      gpu_data_manager_visual_proxy_;
+#endif
 
   // Members initialized in |CreateThreads()| ----------------------------------
   std::unique_ptr<BrowserProcessSubThread> db_thread_;