Add certificate error handling to devtools.

content/public/browser/web_contents_observer.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "base/optional.h"
 #include "base/process/kill.h"
 #include "base/process/process_handle.h"
 #include "content/common/content_export.h"
+#include "content/public/browser/certificate_request_result_type.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/reload_type.h"
+#include "content/public/browser/web_contents.h"
 #include "content/public/common/frame_navigate_params.h"
 #include "content/public/common/resource_type.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/page_transition_types.h"
 #include "ui/base/window_open_disposition.h"
 
 namespace content {
@@ skipping 264 matching lines @@
   // cancelled, e.g. window.stop() is invoked.
   virtual void DidFailLoad(RenderFrameHost* render_frame_host,
                            const GURL& validated_url,
                            int error_code,
                            const base::string16& error_description,
                            bool was_ignored_by_handler) {}
 
   // This method is invoked when the visible security state of the page changes.
   virtual void DidChangeVisibleSecurityState() {}
 
+  using CertErrorCallback = WebContents::CertErrorCallback;

[pfeldman, 2017/02/08 18:24:00]

The code you change is all within content/, so you should not touch public API.

+  // This method is invoked when there is an internal certificate error.
+  // Return value indicates that this observer will handle the error.
+  virtual bool NotifyCertificateError(CertErrorCallback callback);
+
   // This method is invoked when content was loaded from an in-memory cache.
   virtual void DidLoadResourceFromMemoryCache(
       const GURL& url,
       const std::string& mime_type,
       ResourceType resource_type) {}
 
   // This method is invoked when a response has been received for a resource
   // request.
   virtual void DidGetResourceResponseStart(
       const ResourceRequestDetails& details) {}
@@ skipping 200 matching lines @@
   void ResetWebContents();
 
   WebContentsImpl* web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_