Limit foreign fetch to only intercept requests made from secure contexts.

content/renderer/render_frame_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 4007 matching lines @@
   extra_data->set_transferred_request_request_id(
       navigation_state->start_params().transferred_request_request_id);
   extra_data->set_service_worker_provider_id(provider_id);
   extra_data->set_stream_override(std::move(stream_override));
   if (request.getLoFiState() != WebURLRequest::LoFiUnspecified)
     extra_data->set_lofi_state(static_cast<LoFiState>(request.getLoFiState()));
   else if (is_main_frame_ && !navigation_state->request_committed())
     extra_data->set_lofi_state(navigation_state->common_params().lofi_state);
   else
     extra_data->set_lofi_state(is_using_lofi_ ? LOFI_ON : LOFI_OFF);
+  WebString error;
+  extra_data->set_initiated_in_secure_context(
+      frame->document().isSecureContext(error));
   request.setExtraData(extra_data);
 
   // TODO(creis): Update prefetching to work with out-of-process iframes.
   WebFrame* top_frame = frame->top();
   if (top_frame && top_frame->isWebLocalFrame()) {
     DocumentState* top_document_state =
         DocumentState::FromDataSource(top_frame->dataSource());
     if (top_document_state) {
       // TODO(gavinp): separate out prefetching and prerender field trials
       // if the rel=prerender rel type is sticking around.
@@ skipping 2197 matching lines @@
   // event target. Potentially a Pepper plugin will receive the event.
   // In order to tell whether a plugin gets the last mouse event and which it
   // is, we set |pepper_last_mouse_event_target_| to null here. If a plugin gets
   // the event, it will notify us via DidReceiveMouseEvent() and set itself as
   // |pepper_last_mouse_event_target_|.
   pepper_last_mouse_event_target_ = nullptr;
 #endif
 }
 
 }  // namespace content