Replace scoped_ptr with std::unique_ptr in //ui

ui/views/controls/combobox/combobox.cc

Index: ui/views/controls/combobox/combobox.cc
diff --git a/ui/views/controls/combobox/combobox.cc b/ui/views/controls/combobox/combobox.cc
index 3de636fbdc15b1add675be3c316968e7afca2c1f..af0caa6be92b60086508c9893db05a0bed266e65 100644
--- a/ui/views/controls/combobox/combobox.cc
+++ b/ui/views/controls/combobox/combobox.cc
@@ -356,7 +356,7 @@ Combobox::Combobox(ui::ComboboxModel* model)
   SetFocusable(true);
   UpdateBorder();
   // set_background() takes ownership but takes a raw pointer.
-  scoped_ptr<Background> b = PlatformStyle::CreateComboboxBackground();
+  std::unique_ptr<Background> b = PlatformStyle::CreateComboboxBackground();
   set_background(b.release());
 
   // Initialize the button images.
@@ -700,7 +700,8 @@ void Combobox::ButtonPressed(Button* sender, const ui::Event& event) {
 }
 
 void Combobox::UpdateBorder() {
-  scoped_ptr<FocusableBorder> border(PlatformStyle::CreateComboboxBorder());
+  std::unique_ptr<FocusableBorder> border(
+      PlatformStyle::CreateComboboxBorder());
   if (style_ == STYLE_ACTION)
     border->SetInsets(5, 10, 5, 10);
   if (invalid_)