[Autofill] Fix of crashes caused by show-autofill-signatures flag

components/autofill/content/renderer/password_autofill_agent.h

 // 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.
 
 #ifndef COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_AUTOFILL_AGENT_H_
 #define COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_AUTOFILL_AGENT_H_
 
 #include <map>
 #include <memory>
 #include <vector>
@@ skipping 12 matching lines @@
 #include "mojo/public/cpp/bindings/binding.h"
 #include "third_party/WebKit/public/web/WebInputElement.h"
 
 namespace blink {
 class WebInputElement;
 class WebSecurityOrigin;
 }
 
 namespace autofill {
 
+// Names of HTML attributes to show form and field signatures for debugging.
+const char kDebugAttributeForFormSignature[] = "form_signature";
+const char kDebugAttributeForFieldSignature[] = "field_signature";
+
 class RendererSavePasswordProgressLogger;
 
 // This class is responsible for filling password forms.
 class PasswordAutofillAgent : public content::RenderFrameObserver,
                               public mojom::PasswordAutofillAgent {
  public:
   explicit PasswordAutofillAgent(content::RenderFrame* render_frame);
   ~PasswordAutofillAgent() override;
 
   void BindRequest(mojom::PasswordAutofillAgentRequest request);
@@ skipping 245 matching lines @@
   mojom::PasswordManagerDriverPtr password_manager_driver_;
 
   mojo::Binding<mojom::PasswordAutofillAgent> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordAutofillAgent);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_AUTOFILL_AGENT_H_