Expose text track settings in Content and implement for Android

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index eb7c02300b1d842fadd882fbacd8264181255f94..3bfb4b38a7049489dcd674caa0258136013187a4 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -312,6 +312,23 @@ IPC_STRUCT_BEGIN(FrameHostMsg_OpenURL_Params)
   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.
@@ -514,6 +531,10 @@ IPC_MESSAGE_ROUTED1(FrameMsg_DidUpdateSandboxFlags, content::SandboxFlags)
 // 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.