Inform disk cache of WebKit memory cache hits.

net/http/http_cache.h

Index: net/http/http_cache.h
diff --git a/net/http/http_cache.h b/net/http/http_cache.h
index 861d36ba4800a6c97eb06f3c80937d22e949dfe9..bc772553d5cf8552e80b96f7015d30e0babbad7d 100644
--- a/net/http/http_cache.h
+++ b/net/http/http_cache.h
@@ -179,6 +179,11 @@ class NET_API HttpCache : public HttpTransactionFactory,
   // immediately, but they will not be reusable. This is for debugging.
   void CloseAllConnections();
 
+  // Indicates that the renderer's memory cache hit the resource specified by
+  // |url|. Propagate that cache hit to our http cache, so that frequently used
+  // resources stay in the disk cache too.
+  void ReportExternalCacheHit(const GURL& url, const std::string& http_method);

[rvargas (doing something else), 2011/07/27 23:26:17]

Maybe OnExternalCacheHit? I'm not so fond of OnXxx, but from the point of view
of the caller this method doesn't report anything :(

+
   // HttpTransactionFactory implementation:
   virtual int CreateTransaction(scoped_ptr<HttpTransaction>* trans);
   virtual HttpCache* GetCache();
@@ -345,7 +350,6 @@ class NET_API HttpCache : public HttpTransactionFactory,
   // Processes the backend creation notification.
   void OnBackendCreated(int result, PendingOp* pending_op);
 
-
   // Variables ----------------------------------------------------------------
 
   NetLog* net_log_;