Split GL binding init into core and extension part

ui/gfx/gl/gl_implementation_linux.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <vector>
 
 #include "base/base_paths.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/lazy_instance.h"
@@ skipping 161 matching lines @@
       break;
     }
     default:
       return false;
   }
 
 
   return true;
 }
 
+bool InitializeGLExtensionBindings(GLImplementation implementation,
+    GLContext* context) {
+  switch (implementation) {
+    case kGLImplementationOSMesaGL:
+      InitializeGLExtensionBindingsGL(context);
+      InitializeGLExtensionBindingsOSMESA(context);
+      break;
+    case kGLImplementationDesktopGL:
+      InitializeGLExtensionBindingsGL(context);
+      InitializeGLExtensionBindingsGLX(context);
+      break;
+    case kGLImplementationEGLGLES2:
+      InitializeGLExtensionBindingsGL(context);
+      InitializeGLExtensionBindingsEGL(context);
+      break;
+    case kGLImplementationMockGL:
+      InitializeGLExtensionBindingsGL(context);
+      break;
+    default:
+      return false;
+  }
+
+  return true;
+}
+
 void InitializeDebugGLBindings() {
   InitializeDebugGLBindingsEGL();
   InitializeDebugGLBindingsGL();
 #if !defined(USE_WAYLAND)
   InitializeDebugGLBindingsGLX();
   InitializeDebugGLBindingsOSMESA();
 #endif
 }
 
 }  // namespace gfx