Move SearchProvider implementation into Blink and make it a no-op.

chrome/browser/search_engines/search_provider_install_data.h

-// Copyright (c) 2012 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 CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_DATA_H_
-#define CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_DATA_H_
-
-#include <memory>
-#include <string>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_vector.h"
-#include "base/memory/weak_ptr.h"
-
-class GURL;
-class GoogleURLTracker;
-class SearchHostToURLsMap;
-class TemplateURL;
-class TemplateURLService;
-
-namespace content {
-class RenderProcessHost;
-}
-
-// Provides the search provider install state for the I/O thread. It works by
-// loading the data on demand (when CallWhenLoaded is called) and then throwing
-// away the results after the callbacks are done, so the results are always up
-// to date with what is in the database.
-class SearchProviderInstallData {
- public:
-  enum State {
-    // The search provider is not installed.
-    NOT_INSTALLED = 0,
-
-    // The search provider is in the user's set but is not
-    INSTALLED_BUT_NOT_DEFAULT = 1,
-
-    // The search provider is set as the user's default.
-    INSTALLED_AS_DEFAULT = 2
-  };
-
-  // |host| is a RenderProcessHost that is observed, and whose destruction is a
-  // signal to this class that it no longer needs to be kept up to date. (Note
-  // that this class may be deleted before or after that death occurs. It
-  // doesn't matter.)
-  SearchProviderInstallData(TemplateURLService* template_url_service,
-                            const std::string& google_base_url,
-                            GoogleURLTracker* google_url_tracker,
-                            content::RenderProcessHost* host);
-  virtual ~SearchProviderInstallData();
-
-  // Use to determine when the search provider information is loaded. The
-  // callback may happen synchronously or asynchronously. There is no need to do
-  // anything special to make it function (as it just relies on the normal I/O
-  // thread message loop).
-  void CallWhenLoaded(const base::Closure& closure);
-
-  // Returns the search provider install state for the given origin.
-  // This should only be called while a task is called back from CallWhenLoaded.
-  State GetInstallState(const GURL& requested_origin);
-
-  // Called when the google base url has changed.
-  void OnGoogleURLChange(const std::string& google_base_url);
-
- private:
-  // Receives a copy of the TemplateURLService's keywords on the IO thread.
-  void OnTemplateURLsLoaded(ScopedVector<TemplateURL> template_urls,
-                            TemplateURL* default_provider);
-
-  // Stores information about the default search provider.
-  void SetDefault(const TemplateURL* template_url);
-
-  // Sets up the loaded state and then lets clients know that the search
-  // provider install state has been loaded.
-  void OnLoadFailed();
-
-  // Does notifications to let clients know that the search provider
-  // install state has been loaded.
-  void NotifyLoaded();
-
-  // The original data source. Only accessed on the UI thread.
-  TemplateURLService* template_url_service_;
-
-  // The list of closures to call after the load has finished. If empty, there
-  // is no pending load.
-  std::vector<base::Closure> closure_queue_;
-
-  // Holds results of a load that was done using this class.
-  std::unique_ptr<SearchHostToURLsMap> provider_map_;
-
-  // The list of template urls that are owned by the class.
-  ScopedVector<TemplateURL> template_urls_;
-
-  // The security origin for the default search provider.
-  std::string default_search_origin_;
-
-  // The google base url.
-  std::string google_base_url_;
-
-  base::WeakPtrFactory<SearchProviderInstallData> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(SearchProviderInstallData);
-};
-
-#endif  // CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_DATA_H_