Delete all test isolate file.

chrome/telemetry_gpu_unittests.isolate

-# Copyright (c) 2015 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=="android" or OS=="linux" or OS=="mac" or OS=="win"', {
-      'variables': {
-        'files': [
-          # Other dependencies of the tests and their harness.
-          '../third_party/catapult/',
-          '../third_party/logilab/',
-          '../third_party/pylint/',
-          '../third_party/typ/',
-          '../testing/test_env.py',
-          '../testing/xvfb.py',
-          '../testing/scripts/common.py',
-          '../testing/scripts/run_telemetry_as_googletest.py',
-          # The following represent the actual tests.
-          '../content/test/gpu/',
-          # For resolve the imports in content/test/gpu/run_gpu_test.py
-          '../tools/perf/chrome_telemetry_build/',
-          # For webgl_conformance_expectations_unittest
-          '../third_party/webgl/src/sdk/tests/',
-        ],
-        'command': [
-          '../testing/scripts/run_telemetry_as_googletest.py',
-          '../content/test/gpu/run_unittests.py',
-          '-v',
-        ],
-      },
-    }],
-  ]
-}