Presentation API: ignore presentation id passed to startSession().

content/public/browser/presentation_service_delegate.h

Index: content/public/browser/presentation_service_delegate.h
diff --git a/content/public/browser/presentation_service_delegate.h b/content/public/browser/presentation_service_delegate.h
index 89da14d8b3add9ee975be8999cc55179778aa111..b70fcc8df2fa0f931d83b1ed0e5d8a78ee676b43 100644
--- a/content/public/browser/presentation_service_delegate.h
+++ b/content/public/browser/presentation_service_delegate.h
@@ -106,10 +106,6 @@ class CONTENT_EXPORT PresentationServiceDelegate {
   // |presentation_url|.
   // |render_process_id|, |render_frame_id|: ID of originating frame.
   // |presentation_url|: URL of the presentation.
-  // |presentation_id|: The caller may provide an non-empty string to be used
-  // as the ID of the presentation. If empty, the default presentation ID

[whywhat, 2015/07/02 19:54:31]

Perhaps you want to leave the comment about the default presentation id and
generated presentation id in here out of the parameters list?

[mlamouri (slow - plz ping), 2015/07/08 14:37:09]

Done.

-  // will be used. If both are empty, the embedder will automatically generate
-  // one.
   // |success_cb|: Invoked with session info, if presentation session started
   // successfully.
   // |error_cb|: Invoked with error reason, if presentation session did not
@@ -118,7 +114,6 @@ class CONTENT_EXPORT PresentationServiceDelegate {
       int render_process_id,
       int render_frame_id,
       const std::string& presentation_url,
-      const std::string& presentation_id,
       const PresentationSessionSuccessCallback& success_cb,
       const PresentationSessionErrorCallback& error_cb) = 0;