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

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 7f7349ab3265b2251098e10c728cdc2ea33885c5..6f1a5e5b58f8795612f2119d0992c7c215308df1 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1071,6 +1071,9 @@ RenderFrameImpl::RenderFrameImpl(const CreateParams& params)
       is_using_lofi_(false),
       effective_connection_type_(
           blink::WebEffectiveConnectionType::TypeUnknown),
+      effective_connection_type_override_(
+          blink::WebEffectiveConnectionType::TypeUnknown),
+      effective_connection_type_overridden_(false),
       is_pasting_(false),
       suppress_further_dialogs_(false),
       blame_context_(nullptr),
@@ -3751,9 +3754,21 @@ void RenderFrameImpl::dispatchLoad() {
 
 blink::WebEffectiveConnectionType
 RenderFrameImpl::getEffectiveConnectionType() {
+  if (effective_connection_type_overridden_)
+    return effective_connection_type_override_;
   return effective_connection_type_;
 }
 
+void RenderFrameImpl::setEffectiveConnectionTypeOverride(
+    blink::WebEffectiveConnectionType effective_type) {
+  effective_connection_type_override_ = effective_type;
+  effective_connection_type_overridden_ = true;
+}
+
+void RenderFrameImpl::clearEffectiveConnectionTypeOverride() {
+  effective_connection_type_overridden_ = false;
+}
+
 void RenderFrameImpl::didChangeSelection(bool is_empty_selection) {
   if (!GetRenderWidget()->input_handler().handling_input_event() &&
       !handling_select_range_)