**NOTFORLANDING** New link rel=prerender API

chrome/common/prerender_messages.h

Index: chrome/common/prerender_messages.h
diff --git a/chrome/common/prerender_messages.h b/chrome/common/prerender_messages.h
index 4c965a94f9fdeae3a7abb37734a4d1fcf63bd7a0..416e516e033c3c03823f737e7df6408ad478401b 100644
--- a/chrome/common/prerender_messages.h
+++ b/chrome/common/prerender_messages.h
@@ -3,13 +3,41 @@
 // found in the LICENSE file.
 
 // Multiply-included message file, no traditional include guard.
+#include "content/public/common/common_param_traits.h"
+#include "content/public/common/referrer.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_param_traits.h"
+#include "ui/gfx/size.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebReferrerPolicy.h"
 
 #define IPC_MESSAGE_START PrerenderMsgStart
 
+// Prerender Link Manager Messages
+// These are messages sent from the renderer to the browser in
+// relation to <link rel=prerender> elements.
+
+// Notifies of the insertion of a <link rel=prerender> element in the
+// document.
+IPC_MESSAGE_CONTROL5(PrerenderHostMsg_AddPrerender,
+                     int /* id, assigned by WebKit */,
+                     GURL /* url */,
+                     content::Referrer,
+                     gfx::Size,
+                     int /* render_view_route_id of launcher */)
+
+// Notifies on removal of a <link rel=prerender> element from the document.
+IPC_MESSAGE_CONTROL1(PrerenderHostMsg_CancelPrerender,
+                     int /* id, assigned by WebKit */)
+
+// Notifies on unloading a <link rel=prerender> element from a frame.
+IPC_MESSAGE_CONTROL1(PrerenderHostMsg_AbandonPrerender,
+                     int /* id, assigned by WebKit */)
+
+// Prerender View Host Messages
+// These are messages sent in relation to running prerenders.
+
 // Tells a renderer if it's currently being prerendered.  Must only be set
 // to true before any navigation occurs, and only set to false at most once
 // after that.