Drive: Mount/Unmount GoogleDrive on Files App when the file system is mounted/unmounted.

chrome/browser/chromeos/gdata/gdata_file_system_interface.h

 // Copyright (c) 2012 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_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_INTERFACE_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_INTERFACE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 89 matching lines @@
     // Triggered when the file system is initially loaded.
     virtual void OnInitialLoadFinished() {}
 
     // Triggered when a document feed is fetched. |num_accumulated_entries|
     // tells the number of entries fetched so far.
     virtual void OnDocumentFeedFetched(int num_accumulated_entries) {}
 
     // Triggered when the feed from the server is loaded.
     virtual void OnFeedFromServerLoaded() {}
 
+    // Triggered when the file system is mounted.
+    virtual void OnFileSystemMounted() {}
+    // Triggered when the file system is getting unmounted.
+    virtual void OnFileSystemUnmounting() {}
+
    protected:
     virtual ~Observer() {}
   };
 
   // Initializes the object. This function should be called before any
   // other functions.
   virtual void Initialize() = 0;
 
   // Adds and removes the observer.
   virtual void AddObserver(Observer* observer) = 0;
@@ skipping 216 matching lines @@
   // When uploading an existing file, replaces the file entry with a new one,
   // and clears the dirty bit in the cache.
   //
   // |callback| will be called on the UI thread upon completion of operation.
   virtual void AddUploadedFile(UploadMode upload_mode,
                                const FilePath& virtual_dir_path,
                                scoped_ptr<DocumentEntry> entry,
                                const FilePath& file_content_path,
                                GDataCache::FileOperationType cache_operation,
                                const base::Closure& callback) = 0;
+
+  // Registers remote file system proxy for drive mount point.
+  virtual void AddDriveMountPoint() = 0;
+  // Unregisters drive mount point from File API.
+  virtual void RemoveDriveMountPoint() = 0;
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_INTERFACE_H_