convert //headless to std::unique_ptr

headless/lib/browser/headless_browser_main_parts.h

Index: headless/lib/browser/headless_browser_main_parts.h
diff --git a/headless/lib/browser/headless_browser_main_parts.h b/headless/lib/browser/headless_browser_main_parts.h
index f666065845c3a6298fcec5f27713c020a020817e..3b7453ecf9a5bc1db0b98d0e81c978b198d3b0bb 100644
--- a/headless/lib/browser/headless_browser_main_parts.h
+++ b/headless/lib/browser/headless_browser_main_parts.h
@@ -5,7 +5,8 @@
 #ifndef HEADLESS_LIB_BROWSER_HEADLESS_BROWSER_MAIN_PARTS_H_
 #define HEADLESS_LIB_BROWSER_HEADLESS_BROWSER_MAIN_PARTS_H_
 
-#include "base/memory/scoped_ptr.h"
+#include <memory>
+
 #include "content/public/browser/browser_main_parts.h"
 #include "headless/public/headless_browser.h"
 
@@ -31,8 +32,9 @@ class HeadlessBrowserMainParts : public content::BrowserMainParts {
 
  private:
   HeadlessBrowserImpl* browser_;  // Not owned.
-  scoped_ptr<HeadlessBrowserContext> browser_context_;
-  scoped_ptr<devtools_http_handler::DevToolsHttpHandler> devtools_http_handler_;
+  std::unique_ptr<HeadlessBrowserContext> browser_context_;
+  std::unique_ptr<devtools_http_handler::DevToolsHttpHandler>
+      devtools_http_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(HeadlessBrowserMainParts);
 };