Expose text track settings in Content and implement for Android

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 "content/common/content_export.h"
 #include "content/common/content_param_traits.h"
 #include "content/common/frame_message_enums.h"
@@ skipping 294 matching lines @@
 IPC_STRUCT_END()
 
 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)
+  // Background color of the text track.
+  IPC_STRUCT_MEMBER(std::string, text_track_background_color)
+  // Font family of the text track text.

[nasko, 2015/03/12 20:53:53]

nit: Put empty lines between comments and the preceding struct member. It is the
style used in most code in this file.

+  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.
+  IPC_STRUCT_MEMBER(std::string, text_track_font_variant)
+  // Color of the text track text.
+  IPC_STRUCT_MEMBER(std::string, text_track_text_color)
+  // Text shadow (edge style) of the text track text.
+  IPC_STRUCT_MEMBER(std::string, text_track_text_shadow)
+  // Size of the text track text.
+  IPC_STRUCT_MEMBER(std::string, text_track_text_size)
+IPC_STRUCT_END()
+
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
 // This message is used for supporting popup menus on Mac OS X and Android using
 // native controls. See the FrameHostMsg_ShowPopup message.
 IPC_STRUCT_BEGIN(FrameHostMsg_ShowPopup_Params)
   // Position on the screen.
   IPC_STRUCT_MEMBER(gfx::Rect, bounds)
 
   // The height of each item in the menu.
   IPC_STRUCT_MEMBER(int, item_height)
 
@@ skipping 182 matching lines @@
 // Dispatch a load event in the iframe element containing this frame.
 IPC_MESSAGE_ROUTED0(FrameMsg_DispatchLoad)
 
 // Notifies the frame that its parent has changed the frame's sandbox flags.
 IPC_MESSAGE_ROUTED1(FrameMsg_DidUpdateSandboxFlags, content::SandboxFlags)
 
 // 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 */)
 
+// Send to the render view to set text track style settings.

[nasko, 2015/03/12 20:53:53]

s/render view/RenderFrame/

Also, if it is only meant to be sent to the top-level frame, it will be useful
constraint to put in comment.

+IPC_MESSAGE_ROUTED1(FrameMsg_SetTextTrackSettings,
+                    FrameMsg_TextTrackSettings_Params /* params */)
+
 #if defined(OS_ANDROID)
 
 // External popup menus.
 IPC_MESSAGE_ROUTED2(FrameMsg_SelectPopupMenuItems,
                     bool /* user canceled the popup */,
                     std::vector<int> /* selected indices */)
 
 #elif defined(OS_MACOSX)
 
 // External popup menus.
@@ skipping 342 matching lines @@
 IPC_MESSAGE_ROUTED0(FrameHostMsg_DispatchLoad)
 
 #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