Move JS-related password manager code upstream

ios/chrome/browser/passwords/credential_manager.h

Index: ios/chrome/browser/passwords/credential_manager.h
diff --git a/ios/chrome/browser/passwords/credential_manager.h b/ios/chrome/browser/passwords/credential_manager.h
new file mode 100644
index 0000000000000000000000000000000000000000..9a0efcef80d27205d8f05a444873fced1d7960b1
--- /dev/null
+++ b/ios/chrome/browser/passwords/credential_manager.h
@@ -0,0 +1,131 @@
+// Copyright 2015 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 IOS_CHROME_BROWSER_PASSWORDS_CREDENTIAL_MANAGER_H_
+#define IOS_CHROME_BROWSER_PASSWORDS_CREDENTIAL_MANAGER_H_
+
+#include <string>
+#include <vector>
+
+#import "base/mac/scoped_nsobject.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/prefs/pref_member.h"
+#include "components/password_manager/core/browser/credential_manager_password_form_manager.h"
+#include "components/password_manager/core/browser/credential_manager_pending_request_task.h"
+#include "components/password_manager/core/browser/credential_manager_pending_require_user_mediation_task.h"
+#include "components/password_manager/core/browser/password_manager_client.h"
+#include "components/password_manager/core/browser/password_store.h"
+#include "ios/web/public/web_state/web_state_observer.h"
+
+@class JSCredentialManager;
+
+// Implements the app-side of the CredentialManagement JavaScript API.
+// Injects and listens to the injected JavaScript, owns and drives the user
+// interface, and integrates with the password manager. This is the iOS
+// equivalent of the upstream class CredentialManagerDispatcher. Note: Only
+// activates on iOS 8 and later.
+class CredentialManager
+    : public password_manager::CredentialManagerPasswordFormManagerDelegate,
+      public password_manager::CredentialManagerPendingRequestTaskDelegate,
+      public password_manager::
+          CredentialManagerPendingRequireUserMediationTaskDelegate,
+      public web::WebStateObserver {
+ public:
+  CredentialManager(web::WebState* web_state,
+                    password_manager::PasswordManagerClient* client,
+                    password_manager::PasswordManagerDriver* driver,
+                    JSCredentialManager* js_manager);
+  ~CredentialManager() override;
+
+  // web::WebStateObserver:
+  void PageLoaded(
+      web::PageLoadCompletionStatus load_completion_status) override;
+  void CredentialsRequested(int request_id,
+                            const GURL& source_url,
+                            bool zero_click_only,
+                            const std::vector<std::string>& federations,
+                            bool is_user_initiated) override;
+  void SignedIn(int request_id,
+                const GURL& source_url,
+                const web::Credential& credential) override;
+  void SignedOut(int request_id, const GURL& source_url) override;
+  void WebStateDestroyed() override;
+
+  // password_manager::CredentialManagerPendingRequestTaskDelegate:
+  bool IsZeroClickAllowed() const override;
+  GURL GetOrigin() const override;
+  void SendCredential(
+      int id,
+      const password_manager::CredentialInfo& credential) override;
+  password_manager::PasswordManagerClient* client() const override;
+  autofill::PasswordForm GetSynthesizedFormForOrigin() const override;
+
+  // password_manager::CredentialManagerPendingRequireUserMediationTaskDelegate:
+  password_manager::PasswordStore* GetPasswordStore() override;
+  void DoneRequiringUserMediation() override;
+
+  // CredentialManagerPasswordFormManagerDelegate:
+  void OnProvisionalSaveComplete() override;
+
+ private:
+  // The errors that can cause a request to fail.
+  enum ErrorType {
+    // An existing request is outstanding.
+    ERROR_TYPE_PENDING_REQUEST = 0,
+
+    // The password store isn't available.
+    ERROR_TYPE_PASSWORD_STORE_UNAVAILABLE,
+
+    // The page origin is untrusted.
+    ERROR_TYPE_SECURITY_ERROR_UNTRUSTED_ORIGIN,
+  };
+
+  // Sends a message via |js_manager_| to resolve the JavaScript Promise
+  // associated with |request_id|. Invoked after a page-initiated credential
+  // event is acknowledged by the PasswordStore.
+  void ResolvePromise(int request_id);
+
+  // Sends a message via |js_manager_| to reject the JavaScript Promise
+  // associated with |request_id_| with the given |error_type|. Invoked after a
+  // page-initiated credential event, store, or retrieval fails.
+  void RejectPromise(int request_id, ErrorType error_type);
+
+  // Determines the currently loaded page's URL from the active WebState, but
+  // only if it is absolutely trusted. Does not hit the network, but still might
+  // be costly depending on the webview. Returns true if successful.
+  bool GetUrlWithAbsoluteTrust(GURL* page_url);
+
+  // The request to retrieve credentials from the PasswordStore.
+  scoped_ptr<password_manager::CredentialManagerPendingRequestTask>
+      pending_request_;
+
+  // The task to notify the password manager that the user was signed out.
+  scoped_ptr<password_manager::CredentialManagerPendingRequireUserMediationTask>
+      pending_require_user_mediation_;
+
+  // Saves credentials to the PasswordStore.
+  scoped_ptr<password_manager::CredentialManagerPasswordFormManager>
+      form_manager_;
+
+  // Injected JavaScript to provide the API to web pages.
+  base::scoped_nsobject<JSCredentialManager> js_manager_;
+
+  // Client to access Chrome-specific password manager functionality. Weak.
+  password_manager::PasswordManagerClient* client_;
+
+  // Driver to access embedder-specific password manager functionality. Weak.
+  password_manager::PasswordManagerDriver* driver_;
+
+  // Whether zero-click sign-in is enabled.
+  BooleanPrefMember zero_click_sign_in_enabled_;
+
+  // Weak pointer factory for asynchronously resolving requests.
+  base::WeakPtrFactory<CredentialManager> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(CredentialManager);
+};
+
+#endif  // IOS_CHROME_BROWSER_PASSWORDS_CREDENTIAL_MANAGER_H_