Prerender: Disable prefetch if there's an appcache.

chrome/browser/prerender/prerender_test_utils.h

Index: chrome/browser/prerender/prerender_test_utils.h
diff --git a/chrome/browser/prerender/prerender_test_utils.h b/chrome/browser/prerender/prerender_test_utils.h
index 40da70aa063f7f1045412b96a3bb06b1613de160..cdc266baa30ccd705b62d37e3175c95c5cd905a3 100644
--- a/chrome/browser/prerender/prerender_test_utils.h
+++ b/chrome/browser/prerender/prerender_test_utils.h
@@ -355,6 +355,12 @@ class PrerenderInProcessBrowserTest : virtual public InProcessBrowserTest {
   // Returns a string for pattern-matching TaskManager prerender entries.
   base::string16 MatchTaskManagerPrerender(const char* page_title);
 
+  // Returns a GURL for an EmbeddedTestServer that will serves the file
+  // |url_file| with |replacement_text| replacing |replacement_variable|.
+  GURL GetURLWithReplacement(const std::string& url_file,
+                             const std::string& replacement_variable,
+                             const std::string& replacement_text);
+
  protected:
   // For each FinalStatus in |expected_final_status_queue| creates a prerender
   // that is going to verify the correctness of its FinalStatus upon