Update .isolate files for linux_chromeos.

chrome/unit_tests.isolate

Index: chrome/unit_tests.isolate
diff --git a/chrome/unit_tests.isolate b/chrome/unit_tests.isolate
index 36e5af0b99a84c5766de6b2bc13175b82b97bad7..57a080382c06514cf2dbce400b6997d95db8ba58 100644
--- a/chrome/unit_tests.isolate
+++ b/chrome/unit_tests.isolate
@@ -70,7 +70,7 @@
           '../third_party/pywebsocket/',
           '../third_party/tlslite/',
           '<(PRODUCT_DIR)/pyproto/',
-          '<(PRODUCT_DIR)/test_data/chrome/renderer/resources/extensions/',
+          '<(PRODUCT_DIR)/test_data/',
         ],
       },
     }],
@@ -100,12 +100,6 @@
           '--brave-new-test-launcher',
           '--test-launcher-bot-mode',
         ],
-        'isolate_dependency_untracked': [
-          '<(PRODUCT_DIR)/test_data/chrome/browser/resources/google_now/',
-          '<(PRODUCT_DIR)/test_data/chrome/browser/resources/print_preview/',
-          '<(PRODUCT_DIR)/test_data/chrome/test/data/unit/',
-          '<(PRODUCT_DIR)/test_data/ui/',
-        ],
       },
     }],
     ['OS=="win"', {
@@ -123,6 +117,16 @@
         ],
       },
     }],
+    ['chromeos==1', {
+      'variables': {
+        'isolate_dependency_tracked': [
+          '<(PRODUCT_DIR)/libexif.so',
+        ],
+        'isolate_dependency_untracked': [
+          '../chromeos/test/data/network/',
+        ],
+      },
+    }],
   ],
   'includes': [
     '../base/base.isolate',