Split GL binding init into core and extension part

ui/gfx/gl/gl_implementation_linux.cc

Index: ui/gfx/gl/gl_implementation_linux.cc
diff --git a/ui/gfx/gl/gl_implementation_linux.cc b/ui/gfx/gl/gl_implementation_linux.cc
index 568edeba6ddf19968ce726f7dbd43fe34303e263..952e62e5d068255a4a45c8d3d5e324544a6861c0 100644
--- a/ui/gfx/gl/gl_implementation_linux.cc
+++ b/ui/gfx/gl/gl_implementation_linux.cc
@@ -179,6 +179,31 @@ bool InitializeGLBindings(GLImplementation implementation) {
   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();