Remove DirectoryException and LinkException from dart:io and use FileException instaed.

runtime/bin/directory.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "bin/directory.h"
 
 #include "bin/dartutils.h"
 #include "bin/thread.h"
 #include "include/dart_api.h"
 #include "platform/assert.h"
@@ skipping 356 matching lines @@
   return true;
 }
 
 bool SyncDirectoryListing::HandleError(const char* dir_name) {
   Dart_Handle dart_os_error = DartUtils::NewDartOSError();
   Dart_Handle args[3];
   args[0] = DartUtils::NewString("Directory listing failed");
   args[1] = DartUtils::NewString(dir_name);
   args[2] = dart_os_error;
   Dart_ThrowException(Dart_New(
-      DartUtils::GetDartType(DartUtils::kIOLibURL, "DirectoryException"),
+      DartUtils::GetDartType(DartUtils::kIOLibURL, "FileSystemException"),
       Dart_Null(),
       3,
       args));
   return true;
 }
 
 
 static bool ListNext(DirectoryListing* listing) {
   switch (listing->top()->Next(listing)) {
     case kListFile:
@@ skipping 30 matching lines @@
   if (listing->error()) {
     listing->HandleError("Invalid path");
     listing->HandleDone();
   } else {
     while (ListNext(listing)) {}
   }
 }
 
 }  // namespace bin
 }  // namespace dart