Fix swarming of browser_tests and sync_integration_tests on debug windows.

They need base.isolate to bring in the VS runtime DLLs.

BUG=414808
R=maruel@chromium.org

Review URL: https://codereview.chromium.org/617983002

Cr-Commit-Position: refs/heads/master@{#297456}

chrome/browser_tests.isolate

@@ -185,4 +185,7 @@
       },
     }],
   ],
+  'includes': [
+    '../base/base.isolate',
+  ],
 }

chrome/sync_integration_tests.isolate

@@ -94,6 +94,6 @@
     }],
   ],
   'includes': [
-    '../third_party/icu/icu.isolate',
+    '../base/base.isolate',
   ],
 }