Fixed file/directory url resolution for external mount point provider.

content/common/file_system/webfilewriter_impl.cc

 // 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.
 
 #include "content/common/file_system/webfilewriter_impl.h"
 
 #include "content/common/child_thread.h"
 #include "content/common/file_system/file_system_dispatcher.h"
 
 namespace {
 
 inline FileSystemDispatcher* GetFileSystemDispatcher() {
   return ChildThread::current()->file_system_dispatcher();
 }
 }
 
 class WebFileWriterImpl::CallbackDispatcher
     : public fileapi::FileSystemCallbackDispatcher {
  public:
   explicit CallbackDispatcher(
       const base::WeakPtr<WebFileWriterImpl>& writer) : writer_(writer) {
   }
   virtual ~CallbackDispatcher() {
   }
 
+
+  virtual void DidGetLocalPath(const FilePath& local_path) {
+    NOTREACHED();
+  }
   virtual void DidReadMetadata(const base::PlatformFileInfo&, const FilePath&) {
     NOTREACHED();
   }
   virtual void DidReadDirectory(
       const std::vector<base::FileUtilProxy::Entry>& entries,
       bool has_more) {
     NOTREACHED();
   }
   virtual void DidOpenFileSystem(const std::string& name,
                                  const GURL& root) {
@@ skipping 35 matching lines @@
     const GURL& path, const GURL& blob_url, int64 offset) {
   GetFileSystemDispatcher()->Write(
       path, blob_url, offset, &request_id_,
       new CallbackDispatcher(AsWeakPtr()));
 }
 
 void WebFileWriterImpl::DoCancel() {
   GetFileSystemDispatcher()->Cancel(request_id_,
                                     new CallbackDispatcher(AsWeakPtr()));
 }