Convert //chrome/browser/safe_browsing from scoped_ptr to std::unique_ptr

chrome/browser/safe_browsing/srt_fetcher_win.cc

Index: chrome/browser/safe_browsing/srt_fetcher_win.cc
diff --git a/chrome/browser/safe_browsing/srt_fetcher_win.cc b/chrome/browser/safe_browsing/srt_fetcher_win.cc
index 10d155ca7e6c75ae192488c406bbdd711d1c1a60..03f3e2b4637af5c87febfa3b0c7b02b58d0b3138 100644
--- a/chrome/browser/safe_browsing/srt_fetcher_win.cc
+++ b/chrome/browser/safe_browsing/srt_fetcher_win.cc
@@ -313,7 +313,7 @@ class SRTFetcher : public net::URLFetcherDelegate {
 
   // The underlying URL fetcher. The instance is alive from construction through
   // OnURLFetchComplete.
-  scoped_ptr<net::URLFetcher> url_fetcher_;
+  std::unique_ptr<net::URLFetcher> url_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(SRTFetcher);
 };