Push registration should read a "gcm_user_visible_only" key from the Manifest.

content/common/push_messaging_messages.h

Index: content/common/push_messaging_messages.h
diff --git a/content/common/push_messaging_messages.h b/content/common/push_messaging_messages.h
index f6dbdd1b64bafba032389bccc1d0a83ce9895135..352404e414aaceaae4127fb9007b5f3d79b6c87e 100644
--- a/content/common/push_messaging_messages.h
+++ b/content/common/push_messaging_messages.h
@@ -5,6 +5,7 @@
 // IPC messages for push messaging.
 // Multiply-included message file, hence no include guard.
 
+#include "content/common/push_registration_params.h"
 #include "content/public/common/push_messaging_status.h"
 #include "ipc/ipc_message_macros.h"
 #include "third_party/WebKit/public/platform/WebPushPermissionStatus.h"
@@ -20,6 +21,12 @@ IPC_ENUM_TRAITS_MAX_VALUE(
     blink::WebPushPermissionStatus::WebPushPermissionStatusLast)
 // Messages sent from the browser to the renderer.
 
+IPC_STRUCT_TRAITS_BEGIN(content::PushRegistrationParams)
+  IPC_STRUCT_TRAITS_MEMBER(sender_id)
+  IPC_STRUCT_TRAITS_MEMBER(user_visible_only)
+  IPC_STRUCT_TRAITS_MEMBER(user_gesture)

[mlamouri (slow - plz ping), 2014/12/01 21:05:09]

I wouldn't put |user_gesture| in that struct.

[Peter Beverloo, 2014/12/03 15:01:59]

Acknowledged.

+IPC_STRUCT_TRAITS_END()
+
 IPC_MESSAGE_ROUTED3(PushMessagingMsg_RegisterSuccess,
                     int32 /* callbacks_id */,
                     GURL /* push_endpoint */,
@@ -38,11 +45,10 @@ IPC_MESSAGE_ROUTED1(PushMessagingMsg_PermissionStatusFailure,
 
 // Messages sent from the renderer to the browser.
 
-IPC_MESSAGE_CONTROL5(PushMessagingHostMsg_Register,
+IPC_MESSAGE_CONTROL4(PushMessagingHostMsg_Register,
                      int32 /* render_frame_id */,
                      int32 /* callbacks_id */,
-                     std::string /* sender_id */,
-                     bool /* user_gesture */,
+                     content::PushRegistrationParams /* registration_params */,
                      int32 /* service_worker_provider_id */)
 
 IPC_MESSAGE_CONTROL3(PushMessagingHostMsg_PermissionStatus,