Allow creating GLImage-backed textures with glTexStorage2D.

gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h

Index: gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
diff --git a/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h b/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
index c5b581a826a69f065e8f434ada10fe28e6ea9c1e..69eebb6b82d5adc08811d3a06da212bff744dc88 100644
--- a/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
+++ b/gpu/command_buffer/service/gles2_cmd_validation_implementation_autogen.h
@@ -971,6 +971,16 @@ static const GLenum valid_texture_bind_target_table_es3[] = {
     GL_TEXTURE_3D, GL_TEXTURE_2D_ARRAY,
 };
 
+bool Validators::TextureBufferUsageValidator::IsValid(
+    const GLenum value) const {
+  switch (value) {
+    case GL_NONE:
+    case GL_TEXTURE_BUFFER_SCANOUT_CHROMIUM:
+      return true;
+  }
+  return false;
+};
+
 bool Validators::TextureCompareFuncValidator::IsValid(
     const GLenum value) const {
   switch (value) {