Hook up Android closed captions 'enabled' setting to Blink

Source/core/page/Page.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All Rights Reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 16 matching lines @@
 #include "core/editing/Caret.h"
 #include "core/editing/UndoStack.h"
 #include "core/events/Event.h"
 #include "core/fetch/ResourceFetcher.h"
 #include "core/frame/DOMTimer.h"
 #include "core/frame/FrameConsole.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/RemoteFrame.h"
 #include "core/frame/RemoteFrameView.h"
 #include "core/frame/Settings.h"
+#include "core/html/HTMLMediaElement.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/TextAutosizer.h"
 #include "core/page/AutoscrollController.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/ContextMenuController.h"
 #include "core/page/DragController.h"
 #include "core/page/FocusController.h"
 #include "core/page/PointerLockController.h"
 #include "core/page/ValidationMessageClient.h"
@@ skipping 441 matching lines @@
     case SettingsDelegate::ViewportRuleChange:
         {
             if (!mainFrame() || !mainFrame()->isLocalFrame())
                 break;
             Document* doc = toLocalFrame(mainFrame())->document();
             if (!doc || !doc->styleResolver())
                 break;
             doc->styleResolver()->viewportStyleResolver()->collectViewportRules();
         }
         break;
+    case SettingsDelegate::TextTrackKindUserPreferenceChange:
+        for (Frame* frame = mainFrame(); frame; frame = frame->tree().traverseNext()) {
+            if (frame->isLocalFrame()) {
+                HTMLMediaElement::setTextTrackKindUserPreferenceForAllMediaElements(toLocalFrame(frame)->document());

[philipj_slow, 2015/07/09 15:34:09]

There's a null check for doc above so I guess that document can be null here
too? If so it needs to be handled. Handling it here and passing a reference to
HTMLMediaElement would make it clearly not null at that point, but anything
that's roughly consistent with existing code is fine.

[srivats, 2015/07/09 21:25:37]

Done.

+            }
+        }
+        break;
     }
 }
 
 void Page::updateAcceleratedCompositingSettings()
 {
     for (Frame* frame = mainFrame(); frame; frame = frame->tree().traverseNext()) {
         if (!frame->isLocalFrame())
             continue;
         if (FrameView* view = toLocalFrame(frame)->view())
             view->updateAcceleratedCompositingSettings();
@@ skipping 87 matching lines @@
 {
 }
 
 Page::PageClients::~PageClients()
 {
 }
 
 template class CORE_TEMPLATE_EXPORT WillBeHeapSupplement<Page>;
 
 } // namespace blink