Convert //extensions/browser from scoped_ptr to std::unique_ptr

extensions/browser/state_store.cc

Index: extensions/browser/state_store.cc
diff --git a/extensions/browser/state_store.cc b/extensions/browser/state_store.cc
index 2c8c9f9f1c86a13626c5f66a634ec344a197c6c1..ae67f895806bb58586a8f0aef9129b287c2efe08 100644
--- a/extensions/browser/state_store.cc
+++ b/extensions/browser/state_store.cc
@@ -111,7 +111,7 @@ void StateStore::GetExtensionValue(const std::string& extension_id,
 
 void StateStore::SetExtensionValue(const std::string& extension_id,
                                    const std::string& key,
-                                   scoped_ptr<base::Value> value) {
+                                   std::unique_ptr<base::Value> value) {
   task_queue_->InvokeWhenReady(
       base::Bind(&ValueStoreFrontend::Set, base::Unretained(store_.get()),
                  GetFullKey(extension_id, key), base::Passed(&value)));