Fix typos on offline pages

chrome/browser/android/offline_pages/recent_tab_helper.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_ANDROID_OFFLINE_PAGES_RECENT_TAB_HELPER_H_
 #define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_RECENT_TAB_HELPER_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 25 matching lines @@
   // content::WebContentsObserver
   void DidFinishNavigation(
       content::NavigationHandle* navigation_handle) override;
   void DocumentAvailableInMainFrame() override;
   void DocumentOnLoadCompletedInMainFrame() override;
 
   // SnapshotController::Client
   void StartSnapshot() override;
 
   // Test support.
-  // A factory that supplies the instances of an OfflienPageArchiver.
+  // A factory that supplies the instances of an OfflinePageArchiver.
   // This is used for testing, where we want to use a specific mock.
   class TestArchiveFactory {
    public:
     virtual ~TestArchiveFactory() {}
     virtual std::unique_ptr<OfflinePageArchiver> CreateArchiver(
         content::WebContents* web_contents) = 0;
   };
   // Test method, overrides the normally used MHTML Archivers with a test
   // mocks created by specified function.
   void SetArchiveFactoryForTest(
@@ skipping 28 matching lines @@
   std::unique_ptr<SnapshotController> snapshot_controller_;
   std::unique_ptr<TestArchiveFactory> test_archive_factory_;
 
   base::WeakPtrFactory<RecentTabHelper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RecentTabHelper);
 };
 
 }  // namespace offline_pages
 #endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_RECENT_TAB_HELPER_H_