Generate Android .isolate files used for test()s

android_webview/test/BUILD.gn

Index: android_webview/test/BUILD.gn
diff --git a/android_webview/test/BUILD.gn b/android_webview/test/BUILD.gn
index 77de022605714ddcb21dca8a2b913e560ae2e080..64bf134dd40735e1e1ae5c15ba15844c52a94e04 100644
--- a/android_webview/test/BUILD.gn
+++ b/android_webview/test/BUILD.gn
@@ -209,6 +209,9 @@ instrumentation_test_apk("android_webview_test_apk") {
 
 # GYP: //android_webview/android_webview_tests.gypi:android_webview_unittests
 test("android_webview_unittests") {
+  # Tests do not require any data, but our dependencies pull a lot in.
+  ignore_all_data_deps = true
+
   deps = [
     ":android_webview_unittests_assets",
     ":android_webview_unittests_java",