Convert //components/policy from scoped_ptr to std::unique_ptr

components/policy/core/common/policy_loader_ios.mm

Index: components/policy/core/common/policy_loader_ios.mm
diff --git a/components/policy/core/common/policy_loader_ios.mm b/components/policy/core/common/policy_loader_ios.mm
index 8bce12fd3f37f607bf575267857d454d223852d2..0fec8058ed2cffed29f49ddf7e9954cdc3c2572f 100644
--- a/components/policy/core/common/policy_loader_ios.mm
+++ b/components/policy/core/common/policy_loader_ios.mm
@@ -109,8 +109,8 @@ void PolicyLoaderIOS::InitOnBackgroundThread() {
                                                 taskRunner:task_runner()]);
 }
 
-scoped_ptr<PolicyBundle> PolicyLoaderIOS::Load() {
-  scoped_ptr<PolicyBundle> bundle(new PolicyBundle());
+std::unique_ptr<PolicyBundle> PolicyLoaderIOS::Load() {
+  std::unique_ptr<PolicyBundle> bundle(new PolicyBundle());
   NSDictionary* configuration = [[NSUserDefaults standardUserDefaults]
       dictionaryForKey:kConfigurationKey];
   id chromePolicy = configuration[kChromePolicyKey];
@@ -173,7 +173,7 @@ void PolicyLoaderIOS::LoadNSDictionaryToPolicyBundle(NSDictionary* dictionary,
                                                      PolicyBundle* bundle) {
   // NSDictionary is toll-free bridged to CFDictionaryRef, which is a
   // CFPropertyListRef.
-  scoped_ptr<base::Value> value =
+  std::unique_ptr<base::Value> value =
       PropertyToValue(static_cast<CFPropertyListRef>(dictionary));
   base::DictionaryValue* dict = NULL;
   if (value && value->GetAsDictionary(&dict)) {