ContentAPI change - Post DomStorage tasks via a SequencedTaskRunner instead of directly to WEBKIT_DE

content/public/browser/dom_storage_context.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 CONTENT_PUBLIC_BROWSER_DOM_STORAGE_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_DOM_STORAGE_CONTEXT_H_
 #pragma once
 
 #include <vector>
 
 #include "base/string16.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 
 class FilePath;
 
 namespace base {
+class SequencedTaskRunner;
 class Time;
 }
 
 namespace content {
 
 class BrowserContext;
 
 // Represents the per-BrowserContext Local Storage data.
-// Call these methods only on the WebKit thread.
+// Call these methods only on tasks scheduled via it's task_runner().
 class DOMStorageContext : public base::RefCountedThreadSafe<DOMStorageContext> {
  public:
   virtual ~DOMStorageContext() {}
 
+  // Returns a task runner which should be used to schedule tasks
+  // which can invoke the other methods of this interface.
+  virtual base::SequencedTaskRunner* task_runner() const = 0;
+
   // Returns all the file paths of local storage files.
   virtual std::vector<FilePath> GetAllStorageFiles() = 0;
 
   // Get the file name of the local storage file for the given origin.
   virtual FilePath GetFilePath(const string16& origin_id) const = 0;
 
   // Deletes the local storage file for the given origin.
   virtual void DeleteForOrigin(const string16& origin_id) = 0;
 
   // Deletes a single local storage file.
   virtual void DeleteLocalStorageFile(const FilePath& file_path) = 0;
 
   // Delete any local storage files that have been touched since the cutoff
   // date that's supplied. Protected origins, per the SpecialStoragePolicy,
   // are not deleted by this method.
   virtual void DeleteDataModifiedSince(const base::Time& cutoff) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DOM_STORAGE_CONTEXT_H_