Rename all isolate_dependency_* to files.

chrome/gles2_conform_test.isolate

 # Copyright 2013 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.
 {
   'includes': [
     'angle.isolate',
   ],
   'conditions': [
     # TODO(kbr): add Android when these tests are run on those bots.
     ['OS=="linux" or OS=="mac" or OS=="win"', {
       'variables': {
         'command': [
           '<(PRODUCT_DIR)/gles2_conform_test<(EXECUTABLE_SUFFIX)',
         ],
-        'isolate_dependency_tracked': [
+        'files': [
           '<(PRODUCT_DIR)/gles2_conform_test<(EXECUTABLE_SUFFIX)',
           '../gpu/gles2_conform_support/gles2_conform_test_expectations.txt',
         ],
       },
     }],
     # .isolate format doesn't support nested conditions.
     ['(OS=="linux" or OS=="mac" or OS=="win") and internal_gles2_conform_tests==1', {
       'variables': {
-        'isolate_dependency_tracked': [
+        'files': [
+          '../third_party/gles2_conform/GTF_ES/',
           '<(PRODUCT_DIR)/gles2_conform_test_windowless<(EXECUTABLE_SUFFIX)',
           # Could add gles2_conform_test_angle or
           # gles2_conform_test_chromeos if the bots were testing those.
         ],
-        'isolate_dependency_untracked': [
-          '../third_party/gles2_conform/GTF_ES/',
-        ],
       },
     }],
   ],
 }