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

ios/web/public/test/http_server.h

Index: ios/web/public/test/http_server.h
diff --git a/ios/web/public/test/http_server.h b/ios/web/public/test/http_server.h
index bc96a1fc03dbb4aea6292e3bcf93f50ac9d7b1f1..daf359f5ff7924221c796bea77632c3ddd68e57f 100644
--- a/ios/web/public/test/http_server.h
+++ b/ios/web/public/test/http_server.h
@@ -5,12 +5,12 @@
 #ifndef IOS_WEB_PUBLIC_TEST_HTTP_SERVER_H_
 #define IOS_WEB_PUBLIC_TEST_HTTP_SERVER_H_
 
+#include <memory>
 #include <vector>
 
 #import "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/synchronization/lock.h"
 #include "ios/web/public/test/response_providers/response_provider.h"
@@ -36,7 +36,7 @@ class RefCountedResponseProviderWrapper :
  private:
   friend class base::RefCounted<RefCountedResponseProviderWrapper>;
   // The ResponseProvider that backs this object.
-  scoped_ptr<ResponseProvider> response_provider_;
+  std::unique_ptr<ResponseProvider> response_provider_;
   virtual ~RefCountedResponseProviderWrapper();
 };