Separate same domain and cross domain <link rel=...> prerenders for reporting.

chrome/browser/prerender/prerender_origin.cc

Index: chrome/browser/prerender/prerender_origin.cc
diff --git a/chrome/browser/prerender/prerender_origin.cc b/chrome/browser/prerender/prerender_origin.cc
index 503f0bf83273d231c2a29b5abc04346f21168371..af138188645b75c97d52dba8be9788d091be9b59 100644
--- a/chrome/browser/prerender/prerender_origin.cc
+++ b/chrome/browser/prerender/prerender_origin.cc
@@ -12,7 +12,7 @@ namespace prerender {
 namespace {
 
 const char* kOriginNames[] = {
-  "Link Rel Prerender",
+  "[Deprecated] Link Rel Prerender (original)",
   "[Deprecated] Omnibox (original)",
   "GWS Prerender",
   "[Deprecated] Omnibox (conservative)",
@@ -20,6 +20,8 @@ const char* kOriginNames[] = {
   "Omnibox",
   "Local Predictor",
   "None",
+  "Link Rel Prerender (same domain)",
+  "Link Rel Prerender (cross domain)",
   "Max",
 };
 COMPILE_ASSERT(arraysize(kOriginNames) == ORIGIN_MAX + 1,