Add the boilerplate for actions to File System Provider API.

chrome/browser/chromeos/file_system_provider/provided_file_system_interface.h

 // Copyright 2014 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_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_INTERFACE_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_INTERFACE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 33 matching lines @@
   std::string name;
   int64 size;
   base::Time modification_time;
   std::string mime_type;
   std::string thumbnail;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(EntryMetadata);
 };
 
+// Type of an action.
+enum ActionType {
+  ACTION_TYPE_SHARE,
+  ACTION_TYPE_PIN_TOGGLE,
+  ACTION_TYPE_CUSTOM
+};
+
+// Represents actions for either a file or a directory.
+struct Action {
+  std::string id;
+  ActionType type;
+  std::string title;
+};
+
+typedef std::vector<Action> Actions;
+
 // Mode of opening a file. Used by OpenFile().
 enum OpenFileMode { OPEN_FILE_MODE_READ, OPEN_FILE_MODE_WRITE };
 
 // Contains information about an opened file.
 struct OpenedFile {
   OpenedFile(const base::FilePath& file_path, OpenFileMode& mode);
   OpenedFile();
   ~OpenedFile();
 
   base::FilePath file_path;
@@ skipping 20 matching lines @@
   typedef base::Callback<void(int file_handle, base::File::Error result)>
       OpenFileCallback;
 
   typedef base::Callback<
       void(int chunk_length, bool has_more, base::File::Error result)>
       ReadChunkReceivedCallback;
 
   typedef base::Callback<void(scoped_ptr<EntryMetadata> entry_metadata,
                               base::File::Error result)> GetMetadataCallback;
 
+  typedef base::Callback<void(const Actions& actions, base::File::Error result)>
+      GetActionsCallback;
+
   // Mask of fields requested from the GetMetadata() call.
   typedef int MetadataFieldMask;
 
   virtual ~ProvidedFileSystemInterface() {}
 
   // Requests unmounting of the file system. The callback is called when the
   // request is accepted or rejected, with an error code.
   virtual AbortCallback RequestUnmount(
       const storage::AsyncFileUtil::StatusCallback& callback) = 0;
 
   // Requests metadata of the passed |entry_path|. It can be either a file
   // or a directory. All |fields| will be returned if supported. Note, that
   // default fields are always returned.
   virtual AbortCallback GetMetadata(const base::FilePath& entry_path,
                                     MetadataFieldMask fields,
                                     const GetMetadataCallback& callback) = 0;
 
+  // Requests list of actions for the passed |entry_path|. It can be either a
+  // file or a directory.
+  virtual AbortCallback GetActions(const base::FilePath& entry_path,
+                                   const GetActionsCallback& callback) = 0;
+
   // Requests enumerating entries from the passed |directory_path|. The callback
   // can be called multiple times until |has_more| is set to false.
   virtual AbortCallback ReadDirectory(
       const base::FilePath& directory_path,
       const storage::AsyncFileUtil::ReadDirectoryCallback& callback) = 0;
 
   // Requests opening a file at |file_path|. If the file doesn't exist, then the
   // operation will fail.
   virtual AbortCallback OpenFile(const base::FilePath& file_path,
                                  OpenFileMode mode,
@@ skipping 122 matching lines @@
   virtual void RemoveObserver(ProvidedFileSystemObserver* observer) = 0;
 
   // Returns a weak pointer to this object.
   virtual base::WeakPtr<ProvidedFileSystemInterface> GetWeakPtr() = 0;
 };
 
 }  // namespace file_system_provider
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_INTERFACE_H_