[Autofill] Migrate ChromePasswordManagerClient<-->PasswordGenerationAgent IPCs to mojo.

components/autofill/content/renderer/password_generation_agent.h

Index: components/autofill/content/renderer/password_generation_agent.h
diff --git a/components/autofill/content/renderer/password_generation_agent.h b/components/autofill/content/renderer/password_generation_agent.h
index df2b9a7a7e757afbf3579a9dd089b5dc0c960d49..824d4cf7f269e3acfad124f9a916938315295376 100644
--- a/components/autofill/content/renderer/password_generation_agent.h
+++ b/components/autofill/content/renderer/password_generation_agent.h
@@ -97,6 +97,8 @@ class PasswordGenerationAgent : public content::RenderFrameObserver,
 
   const mojom::PasswordManagerDriverPtr& GetPasswordManagerDriver();
 
+  const mojom::PasswordManagerClientAssociatedPtr& GetPasswordManagerClient();
+
   // Helper function that will try and populate |password_elements_| and
   // |possible_account_creation_form_|.
   void FindPossibleGenerationForm();
@@ -182,6 +184,8 @@ class PasswordGenerationAgent : public content::RenderFrameObserver,
   // in password fields are updated.
   PasswordAutofillAgent* password_agent_;
 
+  mojom::PasswordManagerClientAssociatedPtr password_manager_client_;
+
   mojo::Binding<mojom::PasswordGenerationAgent> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordGenerationAgent);