Convert //ios from scoped_ptr to std::unique_ptr.

ios/chrome/browser/safe_browsing/ping_manager.h

Index: ios/chrome/browser/safe_browsing/ping_manager.h
diff --git a/ios/chrome/browser/safe_browsing/ping_manager.h b/ios/chrome/browser/safe_browsing/ping_manager.h
index 5e0a1212b7755ff565f4d00a3fd06660f49bceb7..342027bc9b7afe9a5dc0ed60576c76d4ee2aceb7 100644
--- a/ios/chrome/browser/safe_browsing/ping_manager.h
+++ b/ios/chrome/browser/safe_browsing/ping_manager.h
@@ -7,13 +7,13 @@
 
 // A class that reports safebrowsing statistics to Google's SafeBrowsing
 // servers.
+#include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "ios/chrome/browser/safe_browsing/hit_report.h"
 #include "ios/chrome/browser/safe_browsing/protocol_manager_helper.h"
 #include "ios/chrome/browser/safe_browsing/util.h"
@@ -57,7 +57,7 @@ class SafeBrowsingPingManager : public net::URLFetcherDelegate {
   void ReportInvalidCertificateChain(const std::string& serialized_report);
 
   void SetCertificateErrorReporterForTesting(
-      scoped_ptr<certificate_reporting::ErrorReporter>
+      std::unique_ptr<certificate_reporting::ErrorReporter>
           certificate_error_reporter);
 
  private:
@@ -95,7 +95,8 @@ class SafeBrowsingPingManager : public net::URLFetcherDelegate {
   Reports safebrowsing_reports_;
 
   // Sends reports of invalid SSL certificate chains.
-  scoped_ptr<certificate_reporting::ErrorReporter> certificate_error_reporter_;
+  std::unique_ptr<certificate_reporting::ErrorReporter>
+      certificate_error_reporter_;
 
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingPingManager);
 };