PlzNavigate: Enforce 'form-action' CSP on the browser-side.

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 6266 matching lines @@
 
   int load_flags = GetLoadFlagsForWebURLRequest(info.urlRequest);
 
   // Requests initiated via devtools can have caching disabled.
   if (info.isCacheDisabled) {
     // Turn off all caching related flags and set LOAD_BYPASS_CACHE.
     load_flags &= ~(net::LOAD_VALIDATE_CACHE | net::LOAD_SKIP_CACHE_VALIDATION |
                     net::LOAD_ONLY_FROM_CACHE | net::LOAD_DISABLE_CACHE);
     load_flags |= net::LOAD_BYPASS_CACHE;
   }
+
+  bool is_form_submission =
+      info.navigationType == blink::WebNavigationTypeFormSubmitted ||
+      info.navigationType == blink::WebNavigationTypeFormResubmitted;
+
   BeginNavigationParams begin_navigation_params(
       GetWebURLRequestHeaders(info.urlRequest), load_flags,
       info.urlRequest.hasUserGesture(),
       info.urlRequest.skipServiceWorker() !=
           blink::WebURLRequest::SkipServiceWorker::None,
       GetRequestContextTypeForWebURLRequest(info.urlRequest),
       GetMixedContentContextTypeForWebURLRequest(info.urlRequest),
-      initiator_origin);
+      is_form_submission, initiator_origin);
 
   if (!info.form.isNull()) {
     WebSearchableFormData web_searchable_form_data(info.form);
     begin_navigation_params.searchable_form_url =
         web_searchable_form_data.url();
     begin_navigation_params.searchable_form_encoding =
         web_searchable_form_data.encoding().utf8();
   }
 
   if (info.isClientRedirect)
@@ skipping 545 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