Remove some usages of AsyncExtensionFunction::results_.

extensions/browser/api/system_storage/system_storage_api.cc

Index: extensions/browser/api/system_storage/system_storage_api.cc
diff --git a/extensions/browser/api/system_storage/system_storage_api.cc b/extensions/browser/api/system_storage/system_storage_api.cc
index 2629d68f3a5da19c3f144ab4925595301d228066..3bd5ecfa68521df078c83e9011bc3a4523291c69 100644
--- a/extensions/browser/api/system_storage/system_storage_api.cc
+++ b/extensions/browser/api/system_storage/system_storage_api.cc
@@ -20,27 +20,25 @@ SystemStorageGetInfoFunction::SystemStorageGetInfoFunction() {
 SystemStorageGetInfoFunction::~SystemStorageGetInfoFunction() {
 }
 
-bool SystemStorageGetInfoFunction::RunAsync() {
+ExtensionFunction::ResponseAction SystemStorageGetInfoFunction::Run() {
   StorageInfoProvider::Get()->StartQueryInfo(base::Bind(
       &SystemStorageGetInfoFunction::OnGetStorageInfoCompleted, this));
-  return true;
+  return RespondLater();
 }
 
 void SystemStorageGetInfoFunction::OnGetStorageInfoCompleted(bool success) {
   if (success) {
-    results_ = api::system_storage::GetInfo::Results::Create(
-        StorageInfoProvider::Get()->storage_unit_info_list());
+    Respond(ArgumentList(api::system_storage::GetInfo::Results::Create(
+        StorageInfoProvider::Get()->storage_unit_info_list())));
   } else {
-    SetError("Error occurred when querying storage information.");
+    Respond(Error("Error occurred when querying storage information."));
   }
-
-  SendResponse(success);
 }
 
 SystemStorageEjectDeviceFunction::~SystemStorageEjectDeviceFunction() {
 }
 
-bool SystemStorageEjectDeviceFunction::RunAsync() {
+ExtensionFunction::ResponseAction SystemStorageEjectDeviceFunction::Run() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   std::unique_ptr<EjectDevice::Params> params(
@@ -51,7 +49,8 @@ bool SystemStorageEjectDeviceFunction::RunAsync() {
       base::Bind(&SystemStorageEjectDeviceFunction::OnStorageMonitorInit,
                  this,
                  params->id));
-  return true;
+  // EnsureInitialized() above can result in synchronous Respond().
+  return did_respond() ? AlreadyResponded() : RespondLater();
 }
 
 void SystemStorageEjectDeviceFunction::OnStorageMonitorInit(
@@ -90,9 +89,8 @@ void SystemStorageEjectDeviceFunction::HandleResponse(
       result = api::system_storage::EJECT_DEVICE_RESULT_CODE_FAILURE;
   }
 
-  SetResult(base::MakeUnique<base::StringValue>(
-      api::system_storage::ToString(result)));
-  SendResponse(true);
+  Respond(OneArgument(base::MakeUnique<base::StringValue>(
+      api::system_storage::ToString(result))));
 }
 
 SystemStorageGetAvailableCapacityFunction::
@@ -103,7 +101,8 @@ SystemStorageGetAvailableCapacityFunction::
     ~SystemStorageGetAvailableCapacityFunction() {
 }
 
-bool SystemStorageGetAvailableCapacityFunction::RunAsync() {
+ExtensionFunction::ResponseAction
+SystemStorageGetAvailableCapacityFunction::Run() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   std::unique_ptr<GetAvailableCapacity::Params> params(
@@ -114,7 +113,7 @@ bool SystemStorageGetAvailableCapacityFunction::RunAsync() {
       &SystemStorageGetAvailableCapacityFunction::OnStorageMonitorInit,
       this,
       params->id));
-  return true;
+  return RespondLater();
 }
 
 void SystemStorageGetAvailableCapacityFunction::OnStorageMonitorInit(
@@ -139,11 +138,10 @@ void SystemStorageGetAvailableCapacityFunction::OnQueryCompleted(
     api::system_storage::StorageAvailableCapacityInfo result;
     result.id = transient_id;
     result.available_capacity = available_capacity;
-    SetResult(result.ToValue());
+    Respond(OneArgument(result.ToValue()));
   } else {
-    SetError("Error occurred when querying available capacity.");
+    Respond(Error("Error occurred when querying available capacity."));
   }
-  SendResponse(success);
 }
 
 }  // namespace extensions