Respect the disabled extension list during binding initialization.

ui/gl/gl_osmesa_api_implementation.cc

Index: ui/gl/gl_osmesa_api_implementation.cc
diff --git a/ui/gl/gl_osmesa_api_implementation.cc b/ui/gl/gl_osmesa_api_implementation.cc
index 4fa33c6922ed718950e97b2bc1a29e56717e492f..45663797739883080783b4c3d0f895722a19e5e0 100644
--- a/ui/gl/gl_osmesa_api_implementation.cc
+++ b/ui/gl/gl_osmesa_api_implementation.cc
@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <vector>
+
+#include "base/strings/string_split.h"
 #include "ui/gl/gl_osmesa_api_implementation.h"
 
 namespace gfx {
@@ -14,6 +17,8 @@ void InitializeStaticGLBindingsOSMESA() {
     g_real_osmesa = new RealOSMESAApi();
   }
   g_real_osmesa->Initialize(&g_driver_osmesa);
+  g_driver_osmesa.InitializeExtensionBindings(
+      g_real_osmesa->GetEnabledExtensions());
   g_current_osmesa_context = g_real_osmesa;
 }
 
@@ -57,6 +62,19 @@ void RealOSMESAApi::Initialize(DriverOSMESA* driver) {
   InitializeBase(driver);
 }
 
+std::set<std::string> RealOSMESAApi::GetEnabledExtensions() const {
+  std::set<std::string> enabled_extensions;
+
+  std::vector<std::string> platform_extensions_vec;
+  std::string platform_ext = DriverOSMESA::GetPlatformExtensions();
+  base::SplitString(platform_ext, ' ', &platform_extensions_vec);
+
+  enabled_extensions.insert(platform_extensions_vec.begin(),
+                            platform_extensions_vec.end());
+
+  return enabled_extensions;
+}
+
 TraceOSMESAApi::~TraceOSMESAApi() {
 }