[Media Router] Force DEFAULT cast mode when starting presentations from content.

chrome/browser/media/router/create_presentation_connection_request.h

Index: chrome/browser/media/router/create_presentation_connection_request.h
diff --git a/chrome/browser/media/router/create_presentation_connection_request.h b/chrome/browser/media/router/create_presentation_connection_request.h
index 4c9d5aa4f14e0c1ef286a4e37e2eb6c57b05427f..51b96b6dc16dbcbef3435d4b15ce2611adcde80e 100644
--- a/chrome/browser/media/router/create_presentation_connection_request.h
+++ b/chrome/browser/media/router/create_presentation_connection_request.h
@@ -32,6 +32,8 @@ class RouteRequestResult;
 // presentation_service_delegate_impl, which is then passed to and owned by the
 // MediaRouterUI. |success_cb| will be invoked when create-session succeeds, or
 // |error_cb| will be invoked when create-session fails or the UI closes.
+// TODO(mfoltz): Combine this with PresentationRequest as it's largely
+// redundant.
 class CreatePresentationConnectionRequest {
  public:
   using PresentationConnectionCallback =
@@ -42,8 +44,9 @@ class CreatePresentationConnectionRequest {
   //                     URL.
   // |frame_origin|: The origin of the frame that initiated the presentation
   // request.
+  // |is_top_level_frame|: True if the request is from a top level frame.

[takumif, 2017/05/16 21:51:28]

No longer necessary?

[mark a. foltz, 2017/05/16 22:02:11]

Removed.

   // |success_cb|: Callback to invoke when the request succeeds. Must be valid.
-  // |erorr_cb|: Callback to invoke when the request fails. Must be valid.
+  // |error_cb|: Callback to invoke when the request fails. Must be valid.
   CreatePresentationConnectionRequest(
       const RenderFrameHostId& render_frame_host_id,
       const std::vector<GURL>& presentation_urls,