Allows prefetch requests to live beyond the renderer by delaying

content/browser/loader/resource_loader.h

Index: content/browser/loader/resource_loader.h
diff --git a/content/browser/loader/resource_loader.h b/content/browser/loader/resource_loader.h
index 6a611a723f5815b8a29fe9984552003b38f9b25a..bc5b47f674221c926ba1990cae24ea8fdf0d1045 100644
--- a/content/browser/loader/resource_loader.h
+++ b/content/browser/loader/resource_loader.h
@@ -8,6 +8,7 @@
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "base/timer/timer.h"
 #include "content/browser/loader/resource_handler.h"
 #include "content/browser/ssl/ssl_error_handler.h"
 #include "content/common/content_export.h"
@@ -97,6 +98,8 @@ class CONTENT_EXPORT ResourceLoader : public net::URLRequest::Delegate,
 
   void StartRequestInternal();
   void CancelRequestInternal(int error, bool from_renderer);
+  bool DelayCancelForPrefetch(const ResourceRequestInfoImpl& info,
+                              bool from_renderer);
   void CompleteResponseStarted();
   void StartReading(bool is_continuation);
   void ResumeReading();
@@ -133,8 +136,14 @@ class CONTENT_EXPORT ResourceLoader : public net::URLRequest::Delegate,
   // which point we'll receive a new ResourceHandler.
   bool is_transferring_;
 
+  scoped_ptr<base::OneShotTimer<ResourceLoader> > prefetch_timer_;
+
   scoped_ptr<net::ClientCertStore> client_cert_store_;
 
+  // The time in ms to delay a cancel of a prefetch unless otherwise specified
+  // by a flag.
+  static int default_delay_prefetch_cancel_ms_;
+
   base::WeakPtrFactory<ResourceLoader> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceLoader);