Convert //media/blink from scoped_ptr to std::unique_ptr

media/blink/key_system_config_selector.cc

Index: media/blink/key_system_config_selector.cc
diff --git a/media/blink/key_system_config_selector.cc b/media/blink/key_system_config_selector.cc
index 885049c83872d0e5f80ec16863f6b8a501777af0..f48f34b22ca22cf9c8c0403500b054bae971fdc0 100644
--- a/media/blink/key_system_config_selector.cc
+++ b/media/blink/key_system_config_selector.cc
@@ -725,7 +725,7 @@ void KeySystemConfigSelector::SelectConfig(
 
   // 7.2-7.4. Implemented by OnSelectConfig().
   // TODO(sandersd): This should be async, ideally not on the main thread.
-  scoped_ptr<SelectionRequest> request(new SelectionRequest());
+  std::unique_ptr<SelectionRequest> request(new SelectionRequest());
   request->key_system = key_system_ascii;
   request->candidate_configurations = candidate_configurations;
   request->security_origin = security_origin;
@@ -736,7 +736,7 @@ void KeySystemConfigSelector::SelectConfig(
 }
 
 void KeySystemConfigSelector::SelectConfigInternal(
-    scoped_ptr<SelectionRequest> request) {
+    std::unique_ptr<SelectionRequest> request) {
   // Continued from requestMediaKeySystemAccess(), step 7.1, from
   // https://w3c.github.io/encrypted-media/#requestmediakeysystemaccess
   //
@@ -802,7 +802,7 @@ void KeySystemConfigSelector::SelectConfigInternal(
 }
 
 void KeySystemConfigSelector::OnPermissionResult(
-    scoped_ptr<SelectionRequest> request,
+    std::unique_ptr<SelectionRequest> request,
     bool is_permission_granted) {
   request->was_permission_requested = true;
   request->is_permission_granted = is_permission_granted;