Add Blink setting to block doc.written scripts on 2g-like networks

components/test_runner/web_frame_test_proxy.h

Index: components/test_runner/web_frame_test_proxy.h
diff --git a/components/test_runner/web_frame_test_proxy.h b/components/test_runner/web_frame_test_proxy.h
index 15f3f01c05c0e1ea7e3e2f59049d2518b776ab07..8ee5a26e2bc8560308aed04eb873e3419f04ba0e 100644
--- a/components/test_runner/web_frame_test_proxy.h
+++ b/components/test_runner/web_frame_test_proxy.h
@@ -12,6 +12,7 @@
 #include "base/macros.h"
 #include "components/test_runner/test_runner_export.h"
 #include "components/test_runner/web_frame_test_client.h"
+#include "third_party/WebKit/public/platform/WebEffectiveConnectionType.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/web/WebFrameClient.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
@@ -191,6 +192,14 @@ class WebFrameTestProxy : public Base, public WebFrameTestProxyBase {
                                              suggestions);
   }
 
+  blink::WebEffectiveConnectionType getEffectiveConnectionType() override {
+    if (test_client()->getEffectiveConnectionType() !=
+        blink::WebEffectiveConnectionType::TypeUnknown) {
+      return test_client()->getEffectiveConnectionType();
+    }
+    return Base::getEffectiveConnectionType();
+  }
+
   void runModalAlertDialog(const blink::WebString& message) override {
     test_client()->runModalAlertDialog(message);
   }