Add certificate error handling to devtools.

content/public/browser/web_contents_observer.h

Index: content/public/browser/web_contents_observer.h
diff --git a/content/public/browser/web_contents_observer.h b/content/public/browser/web_contents_observer.h
index 74218f22e802ac54244c7f3ca99d489e54964093..9033767bf997efd05eed95fa77212303f020f513 100644
--- a/content/public/browser/web_contents_observer.h
+++ b/content/public/browser/web_contents_observer.h
@@ -12,6 +12,7 @@
 #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/common/frame_navigate_params.h"
@@ -298,6 +299,11 @@ class CONTENT_EXPORT WebContentsObserver : public IPC::Listener,
   // This method is invoked when the visible security state of the page changes.
   virtual void DidChangeVisibleSecurityState() {}
 
+  using CertErrorHandler =

[Eric Seckler, 2017/01/19 11:42:28]

nit: using CertErrorHandler = WebContents::CertErrorHandler

[irisu, 2017/02/07 23:30:19]

Done.

+      base::Callback<void(content::CertificateRequestResultType)>;
+  // This method is invoked when there is an internal certificate error.

[Eric Seckler, 2017/01/19 11:42:28]

nit: mention what return value indicates :)

[irisu, 2017/02/07 23:30:19]

Done.

+  virtual bool NotifyCertificateError(CertErrorHandler callback);
+
   // This method is invoked when content was loaded from an in-memory cache.
   virtual void DidLoadResourceFromMemoryCache(
       const GURL& url,