Credential Manager: Stub out the browser-side IPC handlers.

components/password_manager/core/browser/password_manager_client.h

Index: components/password_manager/core/browser/password_manager_client.h
diff --git a/components/password_manager/core/browser/password_manager_client.h b/components/password_manager/core/browser/password_manager_client.h
index 99f1282258cbf8a7f39a5c327fab276a2ea89664..474469115eaa056f45dcedae3024ed9113fbf7d9 100644
--- a/components/password_manager/core/browser/password_manager_client.h
+++ b/components/password_manager/core/browser/password_manager_client.h
@@ -14,6 +14,7 @@ class PrefService;
 
 namespace password_manager {
 
+struct CredentialInfo;
 class PasswordFormManager;
 class PasswordManagerDriver;
 class PasswordStore;
@@ -114,6 +115,24 @@ class PasswordManagerClient {
   virtual PasswordStore::AuthorizationPromptPolicy GetAuthorizationPromptPolicy(
       const autofill::PasswordForm& form);
 
+  // Called in response to an IPC from the renderer, triggered by a page's call
+  // to 'navigator.credentials.notifyFailedSignIn'.
+  virtual void OnNotifyFailedSignIn(int request_id, const CredentialInfo&) {}
+
+  // Called in response to an IPC from the renderer, triggered by a page's call
+  // to 'navigator.credentials.notifySignedIn'.
+  virtual void OnNotifySignedIn(int request_id, const CredentialInfo&) {}
+
+  // Called in response to an IPC from the renderer, triggered by a page's call
+  // to 'navigator.credentials.notifySignedOut'.
+  virtual void OnNotifySignedOut(int request_id) {}
+
+  // Called in response to an IPC from the renderer, triggered by a page's call
+  // to 'navigator.credentials.request'.
+  virtual void OnRequestCredential(int request_id,
+                                   bool zero_click_only,
+                                   const std::vector<GURL>& federations) {}
+
  private:
   DISALLOW_COPY_AND_ASSIGN(PasswordManagerClient);
 };