PlzNavigate: Invoke didStartProvisionalLoad() when the renderer initiates a navigation in startLoad(

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 170 matching lines @@
     bool was_user_gesture_seen_;
     std::vector<blink::WebInputElement> elements_;
 
     DISALLOW_COPY_AND_ASSIGN(PasswordValueGatekeeper);
   };
 
   // RenderFrameObserver:
   void DidFinishDocumentLoad() override;
   void DidFinishLoad() override;
   void FrameDetached() override;
-  void DidStartProvisionalLoad() override;
+  void DidStartProvisionalLoad(blink::WebDataSource* data_source) override;
   void WillCommitProvisionalLoad() override;
   void DidCommitProvisionalLoad(bool is_new_navigation,
                                 bool is_same_page_navigation) override;
   void WillSendSubmitEvent(const blink::WebFormElement& form) override;
   void WillSubmitForm(const blink::WebFormElement& form) override;
   void OnDestruct() override;
 
   // Scans the given frame for password forms and sends them up to the browser.
   // If |only_visible| is true, only forms visible in the layout are sent.
   void SendPasswordForms(bool only_visible);
@@ skipping 82 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_