chrome/blink: Add functionality for in-product help for media elements.

third_party/WebKit/Source/modules/media_controls/MediaControlsImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 563 matching lines @@
 }
 
 void MediaControlsImpl::MaybeShow() {
   panel_->SetIsWanted(true);
   panel_->SetIsDisplayed(true);
   if (overlay_play_button_)
     overlay_play_button_->UpdateDisplayType();
   // Only make the controls visible if they won't get hidden by OnTimeUpdate.
   if (MediaElement().paused() || !ShouldHideMediaControls())
     MakeOpaque();
+  download_button_->MaybeDispatchInProductHelpTrigger();
 }
 
 void MediaControlsImpl::Hide() {
   panel_->SetIsWanted(false);
   panel_->SetIsDisplayed(false);
   if (overlay_play_button_)
     overlay_play_button_->SetIsWanted(false);
+  download_button_->DismissInProductHelp();
+}
+
+bool MediaControlsImpl::CanShow() const {
+  return panel_->IsWanted();
 }
 
 bool MediaControlsImpl::IsVisible() const {
   return panel_->IsOpaque();
 }
 
 void MediaControlsImpl::MakeOpaque() {
   panel_->MakeOpaque();
 }
 
@@ skipping 35 matching lines @@
   const bool ignore_focus = behavior_flags & kIgnoreFocus;
   if (!ignore_focus && (MediaElement().IsFocused() ||
                         contains(GetDocument().FocusedElement()))) {
     return false;
   }
 
   // Don't hide the media controls when a panel is showing.
   if (text_track_list_->IsWanted() || overflow_list_->IsWanted())
     return false;
 
+  // Don't hide the media controls while the in product help is showing.
+  if (download_button_->IsShowingInProductHelp())
+    return false;
+
   return true;
 }
 
 void MediaControlsImpl::UpdatePlayState() {
   if (is_paused_for_scrubbing_)
     return;
 
   if (overlay_play_button_)
     overlay_play_button_->UpdateDisplayType();
   play_button_->UpdateDisplayType();
@@ skipping 163 matching lines @@
     }
 
     return;
   }
 
   if (event->type() == EventTypeNames::mouseover) {
     if (!ContainsRelatedTarget(event)) {
       is_mouse_over_controls_ = true;
       if (!MediaElement().paused()) {
         MakeOpaque();
-        if (ShouldHideMediaControls())
-          StartHideMediaControlsTimer();
+        StartHideMediaControlsIfNecessary();
       }
     }
     return;
   }
 
   if (event->type() == EventTypeNames::mouseout) {
     if (!ContainsRelatedTarget(event)) {
       is_mouse_over_controls_ = false;
       StopHideMediaControlsTimer();
     }
@@ skipping 123 matching lines @@
   UpdateCurrentTimeDisplay();
 
   // Update the timeline (the UI with the seek marker).
   timeline_->SetDuration(duration);
 }
 
 void MediaControlsImpl::OnPlay() {
   UpdatePlayState();
   timeline_->SetPosition(MediaElement().currentTime());
   UpdateCurrentTimeDisplay();
+  download_button_->MaybeDispatchInProductHelpTrigger();
 }
 
 void MediaControlsImpl::OnPlaying() {
   timeline_->OnPlaying();
 
   StartHideMediaControlsTimer();
 }
 
 void MediaControlsImpl::OnPause() {
   UpdatePlayState();
@@ skipping 225 matching lines @@
 
 void MediaControlsImpl::HideAllMenus() {
   window_event_listener_->Stop();
 
   if (overflow_list_->IsWanted())
     overflow_list_->SetIsWanted(false);
   if (text_track_list_->IsWanted())
     text_track_list_->SetVisible(false);
 }
 
+void MediaControlsImpl::StartHideMediaControlsIfNecessary() {
+  if (ShouldHideMediaControls())
+    StartHideMediaControlsTimer();
+}
+
 DEFINE_TRACE(MediaControlsImpl) {
   visitor->Trace(element_mutation_callback_);
   visitor->Trace(resize_observer_);
   visitor->Trace(panel_);
   visitor->Trace(overlay_play_button_);
   visitor->Trace(overlay_enclosure_);
   visitor->Trace(play_button_);
   visitor->Trace(current_time_display_);
   visitor->Trace(timeline_);
   visitor->Trace(mute_button_);
@@ skipping 10 matching lines @@
   visitor->Trace(overlay_cast_button_);
   visitor->Trace(media_event_listener_);
   visitor->Trace(window_event_listener_);
   visitor->Trace(orientation_lock_delegate_);
   visitor->Trace(rotate_to_fullscreen_delegate_);
   MediaControls::Trace(visitor);
   HTMLDivElement::Trace(visitor);
 }
 
 }  // namespace blink