Implement Worker-MainThread bridge for FileSystem API in Chrome

content/child/fileapi/webfilesystem_impl.h

 // Copyright 2013 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_CHILD_FILEAPI_WEBFILESYSTEM_IMPL_H_
 #define CONTENT_CHILD_FILEAPI_WEBFILESYSTEM_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
 #include "third_party/WebKit/public/platform/WebFileSystem.h"
 
+namespace base {
+class MessageLoopProxy;
+}
+
 namespace WebKit {
 class WebURL;
 class WebFileWriter;
 class WebFileWriterClient;
 }
 
 namespace content {
 
+class ThreadSafeSender;
+
 class WebFileSystemImpl : public WebKit::WebFileSystem {
  public:
-  WebFileSystemImpl();
-  virtual ~WebFileSystemImpl() { }
+  WebFileSystemImpl(base::MessageLoopProxy* main_thread_loop,
+                    ThreadSafeSender* sender);
+  virtual ~WebFileSystemImpl();
 
   // WebFileSystem implementation.
   virtual void move(
       const WebKit::WebURL& src_path,
       const WebKit::WebURL& dest_path,
       WebKit::WebFileSystemCallbacks*) OVERRIDE;
   virtual void copy(
       const WebKit::WebURL& src_path,
       const WebKit::WebURL& dest_path,
       WebKit::WebFileSystemCallbacks*) OVERRIDE;
@@ skipping 25 matching lines @@
       WebKit::WebFileSystemCallbacks*) OVERRIDE;
   virtual WebKit::WebFileWriter* createFileWriter(
       const WebKit::WebURL& path, WebKit::WebFileWriterClient*) OVERRIDE;
   virtual void createFileWriter(
       const WebKit::WebURL& path,
       WebKit::WebFileWriterClient*,
       WebKit::WebFileSystemCallbacks*) OVERRIDE;
   virtual void createSnapshotFileAndReadMetadata(
       const WebKit::WebURL& path,
       WebKit::WebFileSystemCallbacks*);
+
+ private:
+  scoped_refptr<base::MessageLoopProxy> main_thread_loop_;
+  scoped_refptr<ThreadSafeSender> sender_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_FILEAPI_WEBFILESYSTEM_IMPL_H_