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

chrome/browser/ui/tab_dialogs.h

Index: chrome/browser/ui/tab_dialogs.h
diff --git a/chrome/browser/ui/tab_dialogs.h b/chrome/browser/ui/tab_dialogs.h
index 165501325a51a7b7cf024e1c04090867aa7ef3f6..c7ad9b7d160bd8ad3ee0306b18c6b89e9ba46ede 100644
--- a/chrome/browser/ui/tab_dialogs.h
+++ b/chrome/browser/ui/tab_dialogs.h
@@ -5,9 +5,9 @@
 #ifndef CHROME_BROWSER_UI_TAB_DIALOGS_H_
 #define CHROME_BROWSER_UI_TAB_DIALOGS_H_
 
+#include <memory>
 #include <string>
 
-#include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/supports_user_data.h"
 #include "chrome/browser/ui/validation_message_bubble.h"
@@ -63,7 +63,7 @@ class TabDialogs : public base::SupportsUserData::Data {
   virtual void ShowManagePasswordsBubble(bool user_action) = 0;
   virtual void HideManagePasswordsBubble() = 0;
 
-  virtual scoped_ptr<ValidationMessageBubble> ShowValidationMessage(
+  virtual std::unique_ptr<ValidationMessageBubble> ShowValidationMessage(
       const gfx::Rect& anchor_in_root_view,
       const base::string16& main_text,
       const base::string16& sub_text) = 0;