[Blink, RemotePlayback] Dismissing the dialog rejects with NotAllowedError.

third_party/WebKit/Source/modules/remoteplayback/RemotePlaybackTest.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 "modules/remoteplayback/RemotePlayback.h"
+
+#include "bindings/core/v8/ExceptionStatePlaceholder.h"
+#include "bindings/core/v8/V8BindingForTesting.h"
+#include "core/html/HTMLMediaElement.h"
+#include "core/testing/DummyPageHolder.h"
+#include "platform/testing/UnitTestHelpers.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+class MockFunction : public ScriptFunction {
+public:
+    explicit MockFunction(ScriptState* scriptState) : ScriptFunction(scriptState)
+    {
+    }
+
+    MOCK_METHOD1(call, ScriptValue(ScriptValue));
+
+    v8::Local<v8::Function> bind()
+    {
+        return bindToV8Function();
+    }
+};
+
+class RemotePlaybackTest : public ::testing::Test {
+protected:
+    void cancelPrompt(RemotePlayback* remotePlayback)
+    {
+        remotePlayback->promptCancelled();
+    };

[mlamouri (slow - plz ping), 2016/10/01 14:56:30]

Don't think this ; is needed.

[whywhat, 2016/10/04 19:23:45]

Done.

+};
+
+TEST_F(RemotePlaybackTest, PromptCancelledRejectsWithNotAllowedError)
+{
+    auto pageHolder = DummyPageHolder::create();
+    auto documentBody = pageHolder->document().body();

[mlamouri (slow - plz ping), 2016/10/01 14:56:30]

style: I'm not 100% sure this is style-required but it sounds like an abuse of
'auto'. Can you just write the type names?

[whywhat, 2016/10/04 19:23:45]

DummyPageHolder::create seems fine (returns a smart pointer, auto is used
elsewhere). Removed the rest.

+    documentBody->setInnerHTML("<video>", ASSERT_NO_EXCEPTION);
+    testing::runPendingTasks();
+
+    HTMLMediaElement* element = toHTMLMediaElement(documentBody->firstChild());

[mlamouri (slow - plz ping), 2016/10/01 14:56:30]

Instead of adding a video element to the document via parsing, why not:
```
HTMLMediaElement* element = HTMLVideoElement::create(pageHolder->document());
```

[whywhat, 2016/10/04 19:23:45]

Yep, that's better.

+    auto remotePlayback = RemotePlayback::create(*element);

[mlamouri (slow - plz ping), 2016/10/01 14:56:30]

ditto

[whywhat, 2016/10/04 19:23:45]

Done.

+
+    V8TestingScope scope;
+
+    MockFunction resolve(scope.getScriptState());
+    MockFunction reject(scope.getScriptState());
+
+    EXPECT_CALL(resolve, call(::testing::_)).Times(0);
+    EXPECT_CALL(reject, call(::testing::_)).Times(1);
+
+    remotePlayback->prompt(scope.getScriptState()).then(
+        resolve.bind(), reject.bind());
+    cancelPrompt(remotePlayback);
+}
+
+} // namespace blink