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 dfeb244563af855ad00adf2b196e212db4c0fb0f..8d99b1387cbd218c25d8dcd0866ab8454498deea 100644
--- a/content/test/BUILD.gn
+++ b/content/test/BUILD.gn
@@ -723,6 +723,26 @@ test("content_browsertests") {
 
   data = []
 
+  # Adding all //testing/buildbot/filters/*.content_browsertests.*filter files
+  # as a dependency.
+  #
+  # They might not be used on all platforms (e.g. there is no mac bot coverage
+  # for --site-per-process today), but for simplicity we just include all of
+  # them below (doing this should help avoid unpleasant surprises when a bot
+  # config is switched in testing/buildbot/chromium.fyi.json without
+  # corresponding dependency changes here).

[alexmos, 2016/11/03 01:12:14]

nit: might be helpful to also add a reference to 661447 (in both comments)

[Łukasz Anforowicz, 2016/11/03 17:44:59]

Done.

+  #
+  # To refresh, run the following command in bash:
+  # $ for i in $( \
+  #     find testing/buildbot/filters -name '*.content_browsertests.*filter'); \
+  #   do echo "    \"//$i\","; done | sort
+  data += [
+    "//testing/buildbot/filters/browser-side-navigation.linux.content_browsertests.filter",
+    "//testing/buildbot/filters/cast-linux.content_browsertests.filter",

[alexmos, 2016/11/03 01:12:14]

I wonder how the Cast Linux bot manages to work, since it seems to use this
filter file as well as swarming, but before this, the filter file wasn't
included as a dependency.

[Łukasz Anforowicz, 2016/11/03 17:45:47]

Not sure :-(

Adding slan@ and servolk@ and phajdan.jr@ to CC in case they want to chime in. 
FWIW, the changes in the CL under review should only make things better here.

+    "//testing/buildbot/filters/isolate-extensions.content_browsertests.filter",
+    "//testing/buildbot/filters/site-per-process.content_browsertests.filter",
+  ]
+
   data_deps = [
     "//content/shell:pak",
     "//third_party/mesa:osmesa",
@@ -761,7 +781,6 @@ test("content_browsertests") {
   }
 
   if (is_win || is_linux || is_android) {
-    data += [ "//testing/buildbot/filters/site-per-process.content_browsertests.filter" ]
   }
 
   if (is_win) {
@@ -784,7 +803,6 @@ test("content_browsertests") {
 
   if (is_linux) {
     sources += [ "../zygote/zygote_browsertest.cc" ]
-    data += [ "//testing/buildbot/filters/browser-side-navigation.linux.content_browsertests.filter" ]
   }
 
   if (is_android) {