Cancel prerenders for pages that call window.print()

chrome/browser/prerender/prerender_manager.cc

Index: chrome/browser/prerender/prerender_manager.cc
diff --git a/chrome/browser/prerender/prerender_manager.cc b/chrome/browser/prerender/prerender_manager.cc
index a929b7b676e28afc09ec6cd052ff261cfbae8e7e..ac736da834483124c1c86d4c0ccd29a2fdcff7d8 100644
--- a/chrome/browser/prerender/prerender_manager.cc
+++ b/chrome/browser/prerender/prerender_manager.cc
@@ -359,7 +359,7 @@ std::list<PrerenderManager::PrerenderContentsData>::iterator
   return it;
 }
 
-void PrerenderManager::DestroyPreloadForChildRouteIdPair(
+bool PrerenderManager::DestroyPreloadForChildRouteIdPair(
     const std::pair<int, int>& child_route_id_pair,
     FinalStatus final_status) {
   DCHECK(CalledOnValidThread());
@@ -368,7 +368,9 @@ void PrerenderManager::DestroyPreloadForChildRouteIdPair(
   if (it != prerender_list_.end()) {
     PrerenderContents* prerender_contents = it->contents_;
     prerender_contents->Destroy(final_status);
+    return true;
   }
+  return false;
 }
 
 void PrerenderManager::DeleteOldEntries() {