Respect the disabled extension list during binding initialization.

ui/gl/gl_bindings_autogen_osmesa.cc

Index: ui/gl/gl_bindings_autogen_osmesa.cc
diff --git a/ui/gl/gl_bindings_autogen_osmesa.cc b/ui/gl/gl_bindings_autogen_osmesa.cc
index 299f9f28ab2c7575858ffac97969933da3f2c181..3e3a4eddd342d1c92b0bf6c47c819720abac1542 100644
--- a/ui/gl/gl_bindings_autogen_osmesa.cc
+++ b/ui/gl/gl_bindings_autogen_osmesa.cc
@@ -46,10 +46,10 @@ void DriverOSMESA::InitializeStaticBindings() {
       GetGLProcAddress("OSMesaMakeCurrent"));
   fn.OSMesaPixelStoreFn = reinterpret_cast<OSMesaPixelStoreProc>(
       GetGLProcAddress("OSMesaPixelStore"));
-  std::string extensions(GetPlatformExtensions());
-  extensions += " ";
-  ALLOW_UNUSED_LOCAL(extensions);
+}
 
+void DriverOSMESA::InitializeExtensionBindings(
+    const std::set<std::string>& enabled_extensions) {
   if (g_debugBindingsInitialized)
     InitializeDebugBindings();
 }