[Extensions Bindings] Move signature parsing tests to their own file

extensions/renderer/argument_spec_builder.cc

Index: extensions/renderer/argument_spec_builder.cc
diff --git a/extensions/renderer/argument_spec_builder.cc b/extensions/renderer/argument_spec_builder.cc
new file mode 100644
index 0000000000000000000000000000000000000000..142c77588f71c5d57ef13d7ad72132d92c1369f8
--- /dev/null
+++ b/extensions/renderer/argument_spec_builder.cc
@@ -0,0 +1,78 @@
+// Copyright 2017 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 "extensions/renderer/argument_spec_builder.h"
+
+#include "base/memory/ptr_util.h"
+
+namespace extensions {
+
+ArgumentSpecBuilder::ArgumentSpecBuilder(ArgumentType type)
+    : ArgumentSpecBuilder(type, base::StringPiece()) {}
+
+ArgumentSpecBuilder::ArgumentSpecBuilder(ArgumentType type,
+                                         base::StringPiece name)
+    : spec_(base::MakeUnique<ArgumentSpec>(type)) {
+  if (!name.empty())
+    spec_->set_name(name);
+}
+
+ArgumentSpecBuilder::~ArgumentSpecBuilder() {}
+
+ArgumentSpecBuilder& ArgumentSpecBuilder::MakeOptional() {
+  spec_->set_optional(true);
+  return *this;
+}
+
+ArgumentSpecBuilder& ArgumentSpecBuilder::AddProperty(
+    base::StringPiece property_name,
+    std::unique_ptr<ArgumentSpec> property_spec) {
+  properties_[property_name.as_string()] = std::move(property_spec);
+  return *this;
+}
+
+ArgumentSpecBuilder& ArgumentSpecBuilder::SetMinimum(int minimum) {
+  spec_->set_minimum(minimum);
+  return *this;
+}
+
+ArgumentSpecBuilder& ArgumentSpecBuilder::SetListType(
+    std::unique_ptr<ArgumentSpec> list_type) {
+  spec_->set_list_element_type(std::move(list_type));
+  return *this;
+}
+
+ArgumentSpecBuilder& ArgumentSpecBuilder::SetRef(base::StringPiece ref) {
+  spec_->set_ref(ref);
+  return *this;
+}
+
+ArgumentSpecBuilder& ArgumentSpecBuilder::SetChoices(
+    std::vector<std::unique_ptr<ArgumentSpec>> choices) {
+  spec_->set_choices(std::move(choices));
+  return *this;
+}
+
+ArgumentSpecBuilder& ArgumentSpecBuilder::SetEnums(
+    std::set<std::string> enum_values) {
+  spec_->set_enum_values(std::move(enum_values));
+  return *this;
+}
+
+ArgumentSpecBuilder& ArgumentSpecBuilder::SetAdditionalProperties(
+    std::unique_ptr<ArgumentSpec> additional_properties) {
+  spec_->set_additional_properties(std::move(additional_properties));
+  return *this;
+}
+
+std::unique_ptr<ArgumentSpec> ArgumentSpecBuilder::Build() {
+  spec_->set_properties(std::move(properties_));
+  return std::move(spec_);
+}
+
+ArgumentSpecBuilder::operator std::unique_ptr<ArgumentSpec>() {
+  return Build();
+}
+
+}  // namespace extensions