Implement PrerenderManager::AddPrerenderForOffline()

chrome/browser/prerender/prerender_manager.h

Index: chrome/browser/prerender/prerender_manager.h
diff --git a/chrome/browser/prerender/prerender_manager.h b/chrome/browser/prerender/prerender_manager.h
index c33c540657d6824793f8f84767a7b6c91f52eb00..e133e7188d15dd21c4cb30ecd9c65eebc33a9703 100644
--- a/chrome/browser/prerender/prerender_manager.h
+++ b/chrome/browser/prerender/prerender_manager.h
@@ -151,6 +151,22 @@ class PrerenderManager : public base::SupportsWeakPtr<PrerenderManager>,
       content::SessionStorageNamespace* session_storage_namespace,
       const gfx::Size& size);
 
+  // Adds a prerender for the background loader. Returns a caller-owned
+  // PrerenderHandle* if the URL was added, NULL if it was not.
+  //
+  // The caller may set an observer on the handle to receive load events. When
+  // the caller is done using the WebContents, it should call OnCancel() on the
+  // handle to free the resources associated with the prerender.
+  //
+  // The caller must provide two guarantees:
+  // 1. It must never ask to as for a swap-in;

[mmenke, 2016/04/22 16:41:33]

-"to as"

[gabadie, 2016/04/25 11:08:24]

Done.

+  // 2. The SessionStorageNamespace must not be shared with any tab / page load
+  //    to avoid swapping in from there.
+  PrerenderHandle* AddPrerenderForOffline(
+      const GURL& url,
+      content::SessionStorageNamespace* session_storage_namespace,
+      const gfx::Size& size);
+
   // Cancels all active prerenders.
   void CancelAllPrerenders();