[SafeBrowsing] Reset malware indicator on page nav start.

chrome/browser/safe_browsing/client_side_detection_host.h

Index: chrome/browser/safe_browsing/client_side_detection_host.h
diff --git a/chrome/browser/safe_browsing/client_side_detection_host.h b/chrome/browser/safe_browsing/client_side_detection_host.h
index c24554f6b19faae3c1f40a23c1590c7f013dd62b..c5cf95acbbd3a0a6a589fce8372ee09086564f9f 100644
--- a/chrome/browser/safe_browsing/client_side_detection_host.h
+++ b/chrome/browser/safe_browsing/client_side_detection_host.h
@@ -173,10 +173,6 @@ class ClientSideDetectionHost : public content::WebContentsObserver,
   // This should be accessed from UI thread.
   bool malware_report_enabled_;
 
-  // Set to true if we got a match on malware or phishing for the current
-  // page load. Is reset to false when DidNavigateMainFrame is received.
-  bool malware_or_phishing_match_;
-
   DISALLOW_COPY_AND_ASSIGN(ClientSideDetectionHost);
 };