Hook up Android closed captions 'enabled' setting to Blink

content/common/frame_messages.h

 // Copyright 2013 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.
 
 // IPC messages for interacting with frames.
 // Multiply-included message file, hence no include guard.
 
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_sequence.h"
 #include "content/common/content_export.h"
@@ skipping 341 matching lines @@
 
 IPC_STRUCT_BEGIN(FrameHostMsg_OpenURL_Params)
   IPC_STRUCT_MEMBER(GURL, url)
   IPC_STRUCT_MEMBER(content::Referrer, referrer)
   IPC_STRUCT_MEMBER(WindowOpenDisposition, disposition)
   IPC_STRUCT_MEMBER(bool, should_replace_current_entry)
   IPC_STRUCT_MEMBER(bool, user_gesture)
 IPC_STRUCT_END()
 
 IPC_STRUCT_BEGIN(FrameMsg_TextTrackSettings_Params)
+  // Text tracks on/off state
+  IPC_STRUCT_MEMBER(bool, text_tracks_enabled)
+
   // Background color of the text track.
   IPC_STRUCT_MEMBER(std::string, text_track_background_color)
 
   // Font family of the text track text.
   IPC_STRUCT_MEMBER(std::string, text_track_font_family)
 
   // Font style of the text track text.
   IPC_STRUCT_MEMBER(std::string, text_track_font_style)
 
   // Font variant of the text track text.
@@ skipping 220 matching lines @@
 IPC_MESSAGE_ROUTED1(FrameMsg_DidUpdateSandboxFlags, blink::WebSandboxFlags)
 
 // Update a proxy's window.name property.  Used when the frame's name is
 // changed in another process.
 IPC_MESSAGE_ROUTED1(FrameMsg_DidUpdateName, std::string /* name */)
 
 // Update a proxy's replicated origin.  Used when the frame is navigated to a
 // new origin.
 IPC_MESSAGE_ROUTED1(FrameMsg_DidUpdateOrigin, url::Origin /* origin */)
 
-// Send to the RenderFrame to set text track style settings.
+// Send to the RenderFrame to set text tracks state and style settings.
 // Sent for top-level frames.
 IPC_MESSAGE_ROUTED1(FrameMsg_SetTextTrackSettings,
                     FrameMsg_TextTrackSettings_Params /* params */)
 
 // Posts a message from a frame in another process to the current renderer.
 IPC_MESSAGE_ROUTED1(FrameMsg_PostMessageEvent, FrameMsg_PostMessage_Params)
 
 #if defined(OS_ANDROID)
 
 // External popup menus.
@@ skipping 402 matching lines @@
                     FrameMsg_PostMessage_Params)
 
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
 
 // Message to show/hide a popup menu using native controls.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_ShowPopup,
                     FrameHostMsg_ShowPopup_Params)
 IPC_MESSAGE_ROUTED0(FrameHostMsg_HidePopup)
 
 #endif