Revert of Convert Site Isolation Win bot to --isolate-extensions [2nd attempt].

content/test/BUILD.gn

Index: content/test/BUILD.gn
diff --git a/content/test/BUILD.gn b/content/test/BUILD.gn
index efddf25ad94cafefbe98f42970d3d18e3e668800..a858fd985893b26a7e3107c72168de0a9a5285e7 100644
--- a/content/test/BUILD.gn
+++ b/content/test/BUILD.gn
@@ -726,7 +726,6 @@
 
   data_deps = [
     "//content/shell:pak",
-    "//testing/buildbot/filters:content_browsertests",
     "//third_party/mesa:osmesa",
   ]
 
@@ -763,6 +762,7 @@
   }
 
   if (is_win || is_linux || is_android) {
+    data += [ "//testing/buildbot/filters/site-per-process.content_browsertests.filter" ]
   }
 
   if (is_win) {
@@ -785,6 +785,7 @@
 
   if (is_linux) {
     sources += [ "../zygote/zygote_browsertest.cc" ]
+    data += [ "//testing/buildbot/filters/browser-side-navigation.linux.content_browsertests.filter" ]
   }
 
   if (is_android) {