Only add pdb to isolate when fastbuild!=2.

chrome/interactive_ui_tests.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.
 {
   'conditions': [
     ['OS=="linux"', {
       'variables': {
         'command': [
           '../testing/xvfb.py',
           '<(PRODUCT_DIR)',
@@ skipping 64 matching lines @@
       'variables': {
         'isolate_dependency_tracked': [
           '<(PRODUCT_DIR)/chrome_elf.dll',
           '<(PRODUCT_DIR)/d3dcompiler_46.dll',
           '<(PRODUCT_DIR)/ffmpegsumo.dll',
           '<(PRODUCT_DIR)/libEGL.dll',
           '<(PRODUCT_DIR)/libGLESv2.dll',
           '<(PRODUCT_DIR)/osmesa.dll',
         ],
         'isolate_dependency_untracked': [
+          '<(PRODUCT_DIR)/plugins/npapi_test_plugin.dll',
+        ],
+      },
+    }],
+    ['OS=="win" and (fastbuild==0 or fastbuild==1)', {
+      'variables': {
+        'isolate_dependency_untracked': [
           '<(PRODUCT_DIR)/interactive_ui_tests.exe.pdb',
-          '<(PRODUCT_DIR)/plugins/npapi_test_plugin.dll',
         ],
       },
     }],
     ['chromeos==1', {
       'variables': {
         'isolate_dependency_tracked': [
           '<(PRODUCT_DIR)/keyboard_resources.pak',
           '<(PRODUCT_DIR)/libexif.so',
         ],
         'isolate_dependency_untracked': [
           '../google_apis/test/',
           '<(PRODUCT_DIR)/resources/chromeos/',
         ],
       },
     }],
   ],
   'includes': [
     '../third_party/icu/icu.isolate',
   ],
 }