Delete all test isolate file.

chrome/test/media_router/media_router_tests.isolate

Index: chrome/test/media_router/media_router_tests.isolate
diff --git a/chrome/test/media_router/media_router_tests.isolate b/chrome/test/media_router/media_router_tests.isolate
deleted file mode 100644
index e4004185b151f8c31fe2063f53adb8750b0d090c..0000000000000000000000000000000000000000
--- a/chrome/test/media_router/media_router_tests.isolate
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright (c) 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.
-{
-  'conditions': [
-    ['OS=="linux" or OS=="mac" or OS=="win"', {
-      'variables': {
-        'command': [
-          'internal/media_router_tests.py',
-          '--extension',
-          '<(PRODUCT_DIR)/mr_extension/',
-          '--test_binary',
-          '<(PRODUCT_DIR)/browser_tests<(EXECUTABLE_SUFFIX)',
-        ],
-        'files': [
-          'internal/',
-          '../../../media/test/data/player.html',
-          '../../../media/test/data/bear-vp9-opus.webm',
-          '<(PRODUCT_DIR)/browser_tests<(EXECUTABLE_SUFFIX)',
-          '<(PRODUCT_DIR)/mr_extension/',
-        ],
-      },
-    }],
-  ],
-  'includes': [
-    '../../browser_tests.isolate',
-  ],
-}