[Offline Pages] Removing task runner from OfflinePageModel

BUG=491352
R=jianli@chromium.org

Review URL: https://codereview.chromium.org/1227093011

Cr-Commit-Position: refs/heads/master@{#338817}

3 files changed, 4 insertions, 16 deletions

diff --git a/components/offline_pages/offline_page_model.cc b/components/offline_pages/offline_page_model.cc
index 943297a..bcedcda 100644
--- a/components/offline_pages/offline_page_model.cc
+++ b/components/offline_pages/offline_page_model.cc
@@ -9,7 +9,6 @@
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
-#include "base/single_thread_task_runner.h"
 #include "components/offline_pages/offline_page_item.h"
 #include "components/offline_pages/offline_page_metadata_store.h"
 #include "url/gurl.h"
@@ -48,11 +47,8 @@ SavePageResult ToSavePageResult(ArchiverResult archiver_result) {
 
 }  // namespace
 
-OfflinePageModel::OfflinePageModel(
-    scoped_ptr<OfflinePageMetadataStore> store,
-    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
+OfflinePageModel::OfflinePageModel(scoped_ptr<OfflinePageMetadataStore> store)
     : store_(store.Pass()),
-      task_runner_(task_runner),
       weak_ptr_factory_(this) {
 }
 
@@ -142,7 +138,7 @@ void OfflinePageModel::OnLoadDone(
 
 void OfflinePageModel::InformSavePageDone(const SavePageCallback& callback,
                                           SavePageResult result) {
-  task_runner_->PostTask(FROM_HERE, base::Bind(callback, result));
+  callback.Run(result);
 }
 
 void OfflinePageModel::DeletePendingArchiver(OfflinePageArchiver* archiver) {
diff --git a/components/offline_pages/offline_page_model.h b/components/offline_pages/offline_page_model.h
index fbfab50..8716a0b 100644
--- a/components/offline_pages/offline_page_model.h
+++ b/components/offline_pages/offline_page_model.h
@@ -18,10 +18,6 @@
 
 class GURL;
 
-namespace base {
-class SingleThreadTaskRunner;
-}  // namespace base
-
 namespace offline_pages {
 
 struct OfflinePageItem;
@@ -81,9 +77,7 @@ class OfflinePageModel : public KeyedService {
   typedef base::Callback<void(LoadResult, const std::vector<OfflinePageItem>&)>
       LoadAllPagesCallback;
 
-  OfflinePageModel(
-      scoped_ptr<OfflinePageMetadataStore> store,
-      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
+  explicit OfflinePageModel(scoped_ptr<OfflinePageMetadataStore> store);
   ~OfflinePageModel() override;
 
   // KeyedService implementation.
@@ -135,8 +129,6 @@ class OfflinePageModel : public KeyedService {
   // Pending archivers owned by this model.
   PendingArchivers pending_archivers_;
 
-  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-
   base::WeakPtrFactory<OfflinePageModel> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflinePageModel);
diff --git a/components/offline_pages/offline_page_model_unittest.cc b/components/offline_pages/offline_page_model_unittest.cc
index 1e1621b..af9becf 100644
--- a/components/offline_pages/offline_page_model_unittest.cc
+++ b/components/offline_pages/offline_page_model_unittest.cc
@@ -239,7 +239,7 @@ scoped_ptr<OfflinePageMetadataStore> OfflinePageModelTest::BuildStore() {
 
 scoped_ptr<OfflinePageModel> OfflinePageModelTest::BuildModel() {
   return scoped_ptr<OfflinePageModel>(
-      new OfflinePageModel(BuildStore().Pass(), message_loop_.task_runner()));
+      new OfflinePageModel(BuildStore().Pass()));
 }
 
 void OfflinePageModelTest::PumpLoop() {