Move persistent gesture state to Document, add DocumentUserGestureToken

third_party/WebKit/Source/core/dom/DocumentUserGestureTokenTest.cpp

+// Copyright 2016 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 "core/dom/DocumentUserGestureToken.h"
+
+#include "core/testing/DummyPageHolder.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+TEST(DocumentUserGestureTokenTest, DocumentUserGestureState) {
+  std::unique_ptr<DummyPageHolder> dummyPageHolder =
+      DummyPageHolder::create(IntSize(800, 600));
+  Document& document = dummyPageHolder->document();
+  ASSERT_FALSE(document.hasReceivedUserGesture());
+
+  // A nullptr Document* will not set user gesture state.
+  DocumentUserGestureToken::create(nullptr);
+  EXPECT_FALSE(document.hasReceivedUserGesture());
+
+  // A non-null Document* will set state, but a subsequent nullptr Document*
+  // token will not override it.
+  DocumentUserGestureToken::create(&document);
+  EXPECT_TRUE(document.hasReceivedUserGesture());
+  DocumentUserGestureToken::create(nullptr);
+  EXPECT_TRUE(document.hasReceivedUserGesture());
+  document.clearHasReceivedUserGesture();
+  ASSERT_FALSE(document.hasReceivedUserGesture());
+
+  // UserGestureToken::Status doesn't impact Document gesture state.
+  DocumentUserGestureToken::create(&document, UserGestureToken::NewGesture);
+  EXPECT_TRUE(document.hasReceivedUserGesture());
+}
+
+}  // namespace blink