Introduce new component webdata_services

Move WebDataServiceWrapper into its own component webdata_services so
that the code can be shared with iOS.

The code cannot go into webdata component since it depends on other
components (autofill, password_manager, search_engine, signin) that
depends on webdata (as they implements the WebDataService interface).

BUG=437508

Review URL: https://codereview.chromium.org/777863002

Cr-Commit-Position: refs/heads/master@{#308451}

1 files changed, 85 insertions, 0 deletions

diff --git a/components/webdata_services/web_data_service_wrapper.h b/components/webdata_services/web_data_service_wrapper.h
new file mode 100644
index 0000000..76f5693
--- /dev/null
+++ b/components/webdata_services/web_data_service_wrapper.h
@@ -0,0 +1,85 @@
+// Copyright 2014 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_WEBDATA_SERVICES_WEB_DATA_SERVICE_WRAPPER_H_
+#define COMPONENTS_WEBDATA_SERVICES_WEB_DATA_SERVICE_WRAPPER_H_
+
+#include <string>
+
+#include "base/callback_forward.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "components/keyed_service/core/keyed_service.h"
+#include "sql/init_status.h"
+
+class KeywordWebDataService;
+class TokenWebData;
+class WebDatabaseService;
+
+#if defined(OS_WIN)
+class PasswordWebDataService;
+#endif
+
+namespace autofill {
+class AutofillWebDataBackend;
+class AutofillWebDataService;
+}  // namespace autofill
+
+namespace base {
+class FilePath;
+class MessageLoopProxy;
+}  // namespace base
+
+// WebDataServiceWrapper is a KeyedService that owns multiple WebDataServices
+// so that they can be associated with a context.
+class WebDataServiceWrapper : public KeyedService {
+ public:
+  // ErrorType indicates which service encountered an error loading its data.
+  enum ErrorType {
+    ERROR_LOADING_AUTOFILL,
+    ERROR_LOADING_KEYWORD,
+    ERROR_LOADING_TOKEN,
+    ERROR_LOADING_PASSWORD,
+  };
+
+  // Shows an error message if a loading error occurs.
+  using ShowErrorCallback = void (*)(ErrorType, sql::InitStatus);
+
+  WebDataServiceWrapper(const base::FilePath& profile_path,
+                        const std::string& application_locale,
+                        const scoped_refptr<base::MessageLoopProxy>& ui_thread,
+                        const scoped_refptr<base::MessageLoopProxy>& db_thread,
+                        ShowErrorCallback show_error_callback);
+  ~WebDataServiceWrapper() override;
+
+  // For testing.
+  WebDataServiceWrapper();
+
+  // KeyedService:
+  void Shutdown() override;
+
+  // Create the various types of service instances.  These methods are virtual
+  // for testing purpose.
+  virtual scoped_refptr<autofill::AutofillWebDataService> GetAutofillWebData();
+  virtual scoped_refptr<KeywordWebDataService> GetKeywordWebData();
+  virtual scoped_refptr<TokenWebData> GetTokenWebData();
+#if defined(OS_WIN)
+  virtual scoped_refptr<PasswordWebDataService> GetPasswordWebData();
+#endif
+
+ private:
+  scoped_refptr<WebDatabaseService> web_database_;
+
+  scoped_refptr<autofill::AutofillWebDataService> autofill_web_data_;
+  scoped_refptr<KeywordWebDataService> keyword_web_data_;
+  scoped_refptr<TokenWebData> token_web_data_;
+
+#if defined(OS_WIN)
+  scoped_refptr<PasswordWebDataService> password_web_data_;
+#endif
+
+  DISALLOW_COPY_AND_ASSIGN(WebDataServiceWrapper);
+};
+
+#endif  // COMPONENTS_WEBDATA_SERVICES_WEB_DATA_SERVICE_WRAPPER_H_