Convert //chromecast from scoped_ptr to std::unique_ptr

chromecast/crash/linux/synchronized_minidump_manager.h

Index: chromecast/crash/linux/synchronized_minidump_manager.h
diff --git a/chromecast/crash/linux/synchronized_minidump_manager.h b/chromecast/crash/linux/synchronized_minidump_manager.h
index c25a9070d1e1a1be68f5790542945787d189301d..ce4d9ebacc5dc155b4797d7950497030de174fc1 100644
--- a/chromecast/crash/linux/synchronized_minidump_manager.h
+++ b/chromecast/crash/linux/synchronized_minidump_manager.h
@@ -141,8 +141,8 @@ class SynchronizedMinidumpManager {
   const std::string lockfile_path_;
   const std::string metadata_path_;
   int lockfile_fd_;
-  scoped_ptr<base::Value> metadata_;
-  scoped_ptr<base::ListValue> dumps_;
+  std::unique_ptr<base::Value> metadata_;
+  std::unique_ptr<base::ListValue> dumps_;
 
   DISALLOW_COPY_AND_ASSIGN(SynchronizedMinidumpManager);
 };