Stop using ResourceController in ResourceThrottle

chrome/browser/loader/safe_browsing_resource_throttle.h

Index: chrome/browser/loader/safe_browsing_resource_throttle.h
diff --git a/chrome/browser/loader/safe_browsing_resource_throttle.h b/chrome/browser/loader/safe_browsing_resource_throttle.h
index 2941a6be45c2364ac20f14267d809e9b0920f72d..8a821412ed244b1b57b1b37f803a83bde5056262 100644
--- a/chrome/browser/loader/safe_browsing_resource_throttle.h
+++ b/chrome/browser/loader/safe_browsing_resource_throttle.h
@@ -134,10 +134,6 @@ class SafeBrowsingResourceThrottle
       scoped_refptr<safe_browsing::SafeBrowsingUIManager> ui_manager,
       const security_interstitials::UnsafeResource& resource);
 
-  // Called on the IO thread if the request turned out to be for a prerendered
-  // page.
-  void Cancel();
-
   // Resumes the request, by continuing the deferred action (either starting the
   // request, or following a redirect).
   void ResumeRequest();