Preserving target file name in the save as dialog if target directory doesn't exist.

chrome/browser/resources/file_manager/js/directory_model.js

Index: chrome/browser/resources/file_manager/js/directory_model.js
diff --git a/chrome/browser/resources/file_manager/js/directory_model.js b/chrome/browser/resources/file_manager/js/directory_model.js
index ece9580de972159bef3acd4b351341c44bd919e4..c4b6d950d16d03774e243b9560331edd0851625c 100644
--- a/chrome/browser/resources/file_manager/js/directory_model.js
+++ b/chrome/browser/resources/file_manager/js/directory_model.js
@@ -880,24 +880,24 @@ DirectoryModel.prototype.setupPath = function(path, opt_pathResolveCallback) {
   var INITIAL = true;
   var EXISTS = true;
 
-  function changeToDefault() {
+  function changeToDefault(leafName) {
     var def = self.getDefaultDirectory();
     self.resolveDirectory(def, function(directoryEntry) {
-      resolveCallback(def, '', !EXISTS);
+      resolveCallback(def, leafName, !EXISTS);
       changeDirectoryEntry(directoryEntry, INITIAL);
     }, function(error) {
       console.error('Failed to resolve default directory: ' + def, error);
-      resolveCallback('/', '', !EXISTS);
+      resolveCallback('/', leafName, !EXISTS);
     });
   }
 
-  function noParentDirectory(error) {
+  function noParentDirectory(leafName, error) {
     console.log('Can\'t resolve parent directory: ' + path, error);
-    changeToDefault();
+    changeToDefault(leafName);
   }
 
   if (DirectoryModel.isSystemDirectory(path)) {
-    changeToDefault();
+    changeToDefault('');
     return;
   }
 
@@ -907,11 +907,12 @@ DirectoryModel.prototype.setupPath = function(path, opt_pathResolveCallback) {
   }, function(error) {
     // Usually, leaf does not exist, because it's just a suggested file name.
     var fileExists = error.code == FileError.TYPE_MISMATCH_ERR;
+    var nameDelimiter = path.lastIndexOf('/');
+    var parentDirectoryPath = path.substr(0, nameDelimiter);
+    var leafName = path.substr(nameDelimiter + 1);
     if (fileExists || error.code == FileError.NOT_FOUND_ERR) {
-      var nameDelimiter = path.lastIndexOf('/');
-      var parentDirectoryPath = path.substr(0, nameDelimiter);
       if (DirectoryModel.isSystemDirectory(parentDirectoryPath)) {
-        changeToDefault();
+        changeToDefault(leafName);
         return;
       }
       self.resolveDirectory(parentDirectoryPath,
@@ -926,11 +927,11 @@ DirectoryModel.prototype.setupPath = function(path, opt_pathResolveCallback) {
         // TODO(kaznacheev): Fix history.replaceState for the File Browser and
         // change !INITIAL to INITIAL. Passing |false| makes things
         // less ugly for now.
-      }, noParentDirectory);
+      }, noParentDirectory.bind(null, leafName));
     } else {
       // Unexpected errors.
       console.error('Directory resolving error: ', error);
-      changeToDefault();
+      changeToDefault(leafName);
     }
   });
 };