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..8617e894b2ee53df3b4232303f8fdd2253405731 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"
@@ -54,6 +55,10 @@ class CONTENT_EXPORT ResourceLoader : public net::URLRequest::Delegate,
   // IPC message handlers:
   void OnUploadProgressACK();
 
+  static void set_delay_prefetch_cancel_ms(int cancel_ms) {
+    ResourceLoader::delay_prefetch_cancel_ms_ = cancel_ms;
+  }
+
  private:
   FRIEND_TEST_ALL_PREFIXES(ResourceLoaderTest, ClientCertStoreLookup);
 
@@ -133,10 +138,15 @@ 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_;
 
   base::WeakPtrFactory<ResourceLoader> weak_ptr_factory_;
 
+  // The time in ms to delay a cancel of a prefetch.
+  static int delay_prefetch_cancel_ms_;
+
   DISALLOW_COPY_AND_ASSIGN(ResourceLoader);
 };