Convert //tools to use std::unique_ptr

tools/gn/template.h

Index: tools/gn/template.h
diff --git a/tools/gn/template.h b/tools/gn/template.h
index 43aaf7f43a919d461ea7a93f06b3974d2d45bb67..a79d82f368ba3414a6b36c1f8b02a1f46612f02d 100644
--- a/tools/gn/template.h
+++ b/tools/gn/template.h
@@ -5,10 +5,10 @@
 #ifndef TOOLS_GN_TEMPLATE_H_
 #define TOOLS_GN_TEMPLATE_H_
 
+#include <memory>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 
 class BlockNode;
 class Err;
@@ -30,7 +30,7 @@ class Template : public base::RefCountedThreadSafe<Template> {
   Template(const Scope* scope, const FunctionCallNode* def);
 
   // Takes ownership of a previously-constructed closure.
-  Template(scoped_ptr<Scope> closure, const FunctionCallNode* def);
+  Template(std::unique_ptr<Scope> closure, const FunctionCallNode* def);
 
   // Invoke the template. The values correspond to the state of the code
   // invoking the template.
@@ -49,7 +49,7 @@ class Template : public base::RefCountedThreadSafe<Template> {
   Template();
   ~Template();
 
-  scoped_ptr<Scope> closure_;
+  std::unique_ptr<Scope> closure_;
   const FunctionCallNode* definition_;
 };