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

content/browser/frame_host/navigator_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/browser/frame_host/navigator_impl.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 214 matching lines @@
   }
 
   std::vector<GURL> validated_redirect_chain = redirect_chain;
   for (size_t i = 0; i < validated_redirect_chain.size(); ++i)
     render_process_host->FilterURL(false, &validated_redirect_chain[i]);
   render_frame_host->SetNavigationHandle(NavigationHandleImpl::Create(
       validated_url, validated_redirect_chain,
       render_frame_host->frame_tree_node(), is_renderer_initiated,
       false,  // is_same_page
       navigation_start, pending_nav_entry_id, started_from_context_menu,
-      CSPDisposition::CHECK));  // should_check_main_world_csp
+      CSPDisposition::CHECK,  // should_check_main_world_csp
+      false));                // is_form_submission
 }
 
 void NavigatorImpl::DidFailProvisionalLoadWithError(
     RenderFrameHostImpl* render_frame_host,
     const FrameHostMsg_DidFailProvisionalLoadWithError_Params& params) {
   VLOG(1) << "Failed Provisional Load: " << params.url.possibly_invalid_spec()
           << ", error_code: " << params.error_code
           << ", error_description: " << params.error_description
           << ", showing_repost_interstitial: " <<
             params.showing_repost_interstitial
@@ skipping 1042 matching lines @@
     if (navigation_handle)
       navigation_handle->update_entry_id_for_transfer(entry->GetUniqueID());
 
     controller_->SetPendingEntry(std::move(entry));
     if (delegate_)
       delegate_->NotifyChangedNavigationState(content::INVALIDATE_TYPE_URL);
   }
 }
 
 }  // namespace content