ActivationStateComputingThrottle unit tests

components/subresource_filter/content/browser/async_document_subresource_filter_test_utils.cc

+// 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 "components/subresource_filter/content/browser/async_document_subresource_filter_test_utils.h"
+
+#include "testing/gtest/include/gtest/gtest.h"

[engedy, 2017/03/10 10:56:57]

nit: Also #include base/bind.h and bind_helpers.h here.

[Charlie Harrison, 2017/03/10 17:12:47]

Done.

+
+namespace subresource_filter {
+namespace testing {
+
+base::Callback<void(ActivationState)>
+TestActivationStateCallbackReceiver::GetCallback() {
+  return base::Bind(&TestActivationStateCallbackReceiver::Callback,
+                    base::Unretained(this));
+}
+
+void TestActivationStateCallbackReceiver::ExpectReceivedOnce(
+    const ActivationState& expected_state) const {
+  ASSERT_EQ(1, callback_count_);
+  EXPECT_EQ(expected_state, last_activation_state_);
+}
+
+void TestActivationStateCallbackReceiver::Callback(
+    ActivationState activation_state) {
+  ++callback_count_;
+  last_activation_state_ = activation_state;
+}
+
+}  // namespace testing
+}  // namespace subresource_filter