Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/panels/panel_host.h

Index: chrome/browser/ui/panels/panel_host.h
diff --git a/chrome/browser/ui/panels/panel_host.h b/chrome/browser/ui/panels/panel_host.h
index 49c25b5b2268b598bc5bbdc72ee7aa2848735a8b..bf9cc7b6d91a66834a5077f1d36b296b0c9de314 100644
--- a/chrome/browser/ui/panels/panel_host.h
+++ b/chrome/browser/ui/panels/panel_host.h
@@ -5,8 +5,9 @@
 #ifndef CHROME_BROWSER_UI_PANELS_PANEL_HOST_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_HOST_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
@@ -95,7 +96,7 @@ class PanelHost : public content::WebContentsDelegate,
   Panel* panel_;  // Weak, owns us.
   Profile* profile_;
 
-  scoped_ptr<content::WebContents> web_contents_;
+  std::unique_ptr<content::WebContents> web_contents_;
 
   // The following factory is used to close the panel via the message loop.
   base::WeakPtrFactory<PanelHost> weak_factory_;