Add support for actions for multiple file selection.

chrome/browser/chromeos/file_system_provider/throttled_file_system.h

Index: chrome/browser/chromeos/file_system_provider/throttled_file_system.h
diff --git a/chrome/browser/chromeos/file_system_provider/throttled_file_system.h b/chrome/browser/chromeos/file_system_provider/throttled_file_system.h
index 36534694a53fa09fd2c94fe75c66ea616a03d900..55d4d8c2516f2c56b0719311d38c38c6a4b9c239 100644
--- a/chrome/browser/chromeos/file_system_provider/throttled_file_system.h
+++ b/chrome/browser/chromeos/file_system_provider/throttled_file_system.h
@@ -5,8 +5,8 @@
 #ifndef CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_THROTTLED_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_THROTTLED_FILE_SYSTEM_H_
 
-#include <set>
 #include <string>
+#include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ -49,10 +49,10 @@ class ThrottledFileSystem : public ProvidedFileSystemInterface {
   AbortCallback GetMetadata(const base::FilePath& entry_path,
                             MetadataFieldMask fields,
                             const GetMetadataCallback& callback) override;
-  AbortCallback GetActions(const base::FilePath& entry_path,
+  AbortCallback GetActions(const std::vector<base::FilePath>& entry_paths,
                            const GetActionsCallback& callback) override;
   AbortCallback ExecuteAction(
-      const base::FilePath& entry_path,
+      const std::vector<base::FilePath>& entry_paths,
       const std::string& action_id,
       const storage::AsyncFileUtil::StatusCallback& callback) override;
   AbortCallback ReadDirectory(