Convert //extensions/browser from scoped_ptr to std::unique_ptr

extensions/browser/declarative_user_script_master.h

Index: extensions/browser/declarative_user_script_master.h
diff --git a/extensions/browser/declarative_user_script_master.h b/extensions/browser/declarative_user_script_master.h
index 64f8daec6b395efb1dde89f6e7944ae8cc9a13b2..422b747ffab7314c6e5ee4a9c1f2d70ec889aa36 100644
--- a/extensions/browser/declarative_user_script_master.h
+++ b/extensions/browser/declarative_user_script_master.h
@@ -5,10 +5,10 @@
 #ifndef EXTENSIONS_BROWSER_DECLARATIVE_USER_SCRIPT_MASTER_H_
 #define EXTENSIONS_BROWSER_DECLARATIVE_USER_SCRIPT_MASTER_H_
 
+#include <memory>
 #include <set>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/scoped_observer.h"
 #include "extensions/common/host_id.h"
 
@@ -65,7 +65,7 @@ class DeclarativeUserScriptMaster {
 
   // Script loader that handles loading contents of scripts into shared memory
   // and notifying renderers of script updates.
-  scoped_ptr<UserScriptLoader> loader_;
+  std::unique_ptr<UserScriptLoader> loader_;
 
   DISALLOW_COPY_AND_ASSIGN(DeclarativeUserScriptMaster);
 };