Files.app: Add missing externs for FileManagerPrivate APIs.

third_party/closure_compiler/externs/file_manager_private.js

Index: third_party/closure_compiler/externs/file_manager_private.js
diff --git a/third_party/closure_compiler/externs/file_manager_private.js b/third_party/closure_compiler/externs/file_manager_private.js
index f36dd82771d77c1b49516a2095faa0eab226ff6b..197558814e1cf87f46a5f45db2e07715c3b36e32 100644
--- a/third_party/closure_compiler/externs/file_manager_private.js
+++ b/third_party/closure_compiler/externs/file_manager_private.js
@@ -442,6 +442,15 @@ chrome.fileManagerPrivate.searchDrive = function(searchParams, callback) {};
 chrome.fileManagerPrivate.searchDriveMetadata = function(searchParams, callback) {};
 
 /**
+ * Search for files in the given volume, whose content hash matches the list of
+ * given hashes.
+ * @param {string} volumeId
+ * @param {!Array<string>} hashes
+ * @param {function(!Object<string, !Array<string>>)} callback
+ */
+chrome.fileManagerPrivate.searchFilesByHashes = function(volumeId, hashes, callback) {};
+
+/**
  * Create a zip file for the selected files. |dirURL| URL of the directory
  * containing the selected files. |selectionUrls| URLs of the selected files.
  * The files must be under the     directory specified by dirURL. |destName|
@@ -551,6 +560,13 @@ chrome.fileManagerPrivate.visitDesktop = function(profileId, callback) {};
 chrome.fileManagerPrivate.openInspector = function(type) {};
 
 /**
+ * Computes an MD5 checksum for the given file.
+ * @param {string} fileUrl
+ * @param {function(string)} callback
+ */
+chrome.fileManagerPrivate.computeChecksum = function(fileUrl, callback) {};
+
+/**
  * Gets the MIME type of a file.
  * @param {string} fileUrl File url.
  * @param {function(string)} callback Callback that MIME type of the file is