Move ImportantFileWriter to base/. It now has two consumers, base/prefs and chrome/.

chrome/browser/bookmarks/bookmark_storage.h

 // Copyright (c) 2011 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_BOOKMARKS_BOOKMARK_STORAGE_H_
 #define CHROME_BROWSER_BOOKMARKS_BOOKMARK_STORAGE_H_
 
+#include "base/files/important_file_writer.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/bookmarks/bookmark_index.h"
-#include "chrome/common/important_file_writer.h"
 
 class BookmarkModel;
 class BookmarkPermanentNode;
 
 namespace content {
 class BrowserContext;
 }
 
 // BookmarkLoadDetails is used by BookmarkStorage when loading bookmarks.
 // BookmarkModel creates a BookmarkLoadDetails and passes it (including
@@ skipping 63 matching lines @@
   bool ids_reassigned_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkLoadDetails);
 };
 
 // BookmarkStorage handles reading/write the bookmark bar model. The
 // BookmarkModel uses the BookmarkStorage to load bookmarks from disk, as well
 // as notifying the BookmarkStorage every time the model changes.
 //
 // Internally BookmarkStorage uses BookmarkCodec to do the actual read/write.
-class BookmarkStorage : public ImportantFileWriter::DataSerializer,
+class BookmarkStorage : public base::ImportantFileWriter::DataSerializer,
                         public base::RefCountedThreadSafe<BookmarkStorage> {
  public:
   // Creates a BookmarkStorage for the specified model
   BookmarkStorage(content::BrowserContext* context, BookmarkModel* model);
 
   // Loads the bookmarks into the model, notifying the model when done. This
   // takes ownership of |details|. See BookmarkLoadDetails for details.
   void LoadBookmarks(BookmarkLoadDetails* details);
 
   // Schedules saving the bookmark bar model to disk.
@@ skipping 15 matching lines @@
   virtual ~BookmarkStorage();
 
   // Serializes the data and schedules save using ImportantFileWriter.
   // Returns true on successful serialization.
   bool SaveNow();
 
   // The model. The model is NULL once BookmarkModelDeleted has been invoked.
   BookmarkModel* model_;
 
   // Helper to write bookmark data safely.
-  ImportantFileWriter writer_;
+  base::ImportantFileWriter writer_;
 
   // See class description of BookmarkLoadDetails for details on this.
   scoped_ptr<BookmarkLoadDetails> details_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkStorage);
 };
 
 #endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_STORAGE_H_