Introduce AutocompleteProviderDelegate

components/omnibox/autocomplete_provider_delegate.h

+// 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_OMNIBOX_AUTOCOMPLETE_PROVIDER_DELEGATE_H_
+#define COMPONENTS_OMNIBOX_AUTOCOMPLETE_PROVIDER_DELEGATE_H_
+
+#include "base/strings/string16.h"
+#include "components/history/core/browser/keyword_id.h"
+#include "components/metrics/proto/omnibox_event.pb.h"
+
+struct AutocompleteMatch;
+class AutocompleteSchemeClassifier;
+class GURL;
+
+namespace history {
+class URLDatabase;
+}
+
+namespace net {
+class URLRequestContextGetter;
+}
+
+class AutocompleteProviderDelegate {
+ public:
+  virtual ~AutocompleteProviderDelegate() {}
+
+  // Returns the request context.
+  virtual net::URLRequestContextGetter* GetRequestContext() = 0;

[Peter Kasting, 2014/08/25 19:11:00]

Nit: Some of your APIs are called "GetX()" (like this one) and others just "X()"
(like InMemoryDatabase() below).  Be consistent.  (I'd probably just remove all
"Get"s.)

[hashimoto, 2014/08/26 00:52:30]

Removed "Get"s.

+
+  // Returns whether the provider should work in incognito mode.
+  virtual bool IsOffTheRecord() = 0;
+
+  // The value to use for Accept-Languages HTTP header when making an HTTP
+  // request.
+  virtual std::string GetAcceptLanguages() = 0;
+
+  // Returns true when suggest support is enabled.
+  virtual bool SearchSuggestEnabled() = 0;
+
+  // Returns whether the bookmark bar is visible on all tabs.
+  virtual bool ShowBookmarkBar() = 0;
+
+  // Returns the scheme classifier.
+  virtual const AutocompleteSchemeClassifier& GetSchemeClassifier() = 0;
+
+  // Given some string |text| that the user wants to use for navigation,
+  // determines how it should be interpreted.
+  virtual void Classify(
+      const base::string16& text,
+      bool prefer_keyword,
+      bool allow_exact_keyword_match,
+      metrics::OmniboxEventProto::PageClassification page_classification,
+      AutocompleteMatch* match,
+      GURL* alternate_nav_url) = 0;
+
+  // Returns the in-memory URL database.
+  virtual history::URLDatabase* InMemoryDatabase() = 0;
+
+  // Deletes all URL and search term entries matching the given |term| and
+  // |keyword_id| from history.
+  virtual void DeleteMatchingURLsForKeywordFromHistory(
+      history::KeywordID keyword_id,
+      const base::string16& term) = 0;
+
+  // Returns whether the user has tab sync enabled and tab sync is unencrypted.
+  virtual bool TabSyncEnabledAndUnencrypted() = 0;
+
+  // Start prefetching the image at the given |url|.

[Peter Kasting, 2014/08/25 19:11:00]

Nit: Starts

[hashimoto, 2014/08/26 00:52:30]

Done.

+  virtual void PrefetchImage(const GURL& url) = 0;
+};
+
+#endif  // COMPONENTS_OMNIBOX_AUTOCOMPLETE_PROVIDER_DELEGATE_H_