media_controls: Add UI for showing a promo bubble on a control button.

third_party/WebKit/Source/modules/media_controls/elements/MediaControlButtonPromoElements.cpp

+// 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 "modules/media_controls/elements/MediaControlButtonPromoElements.h"
+
+#include "modules/media_controls/MediaControlsImpl.h"
+#include "platform/text/PlatformLocale.h"
+
+namespace blink {
+
+MediaControlButtonPromoAnimation::MediaControlButtonPromoAnimation(
+    MediaControlsImpl& controls)
+    : MediaControlDivElement(controls, kMediaButtonPromoAnimation) {
+  SetShadowPseudoId(AtomicString("-internal-media-controls-promo-animation"));
+}
+
+MediaControlButtonPromoArrow::MediaControlButtonPromoArrow(
+    MediaControlsImpl& controls)
+    : MediaControlDivElement(controls, kMediaButtonPromoArrow) {
+  SetShadowPseudoId(AtomicString("-internal-media-controls-promo-arrow"));
+}
+
+MediaControlButtonPromoText::MediaControlButtonPromoText(
+    MediaControlsImpl& controls,
+    MediaControlElementType type,
+    WebLocalizedString::Name name)
+    : MediaControlDivElement(controls, type) {
+  SetShadowPseudoId(AtomicString("-internal-media-controls-promo-text"));
+  setTextContent(GetDocument()
+                     .GetCachedLocale(GetDocument().ContentLanguage())
+                     .QueryString(name));
+}
+
+MediaControlButtonPromoContainer::MediaControlButtonPromoContainer(
+    MediaControlsImpl& controls,
+    MediaControlElementType button_type,
+    WebLocalizedString::Name promo_text)
+    : MediaControlDivElement(controls, kMediaButtonPromoContainer) {
+  SetShadowPseudoId(AtomicString("-internal-media-controls-promo-container"));
+
+  animation_ = new MediaControlButtonPromoAnimation(controls);
+  AppendChild(animation_);
+  arrow_ = new MediaControlButtonPromoArrow(controls);
+  AppendChild(arrow_);
+  text_ = new MediaControlButtonPromoText(controls, button_type, promo_text);
+  AppendChild(text_);
+}
+
+DEFINE_TRACE(MediaControlButtonPromoContainer) {
+  visitor->Trace(animation_);
+  visitor->Trace(arrow_);
+  visitor->Trace(text_);
+  MediaControlDivElement::Trace(visitor);
+}
+
+}  // namespace blink