Remove content_settings_client.h abstraction which isn't used

components/content_settings/core/browser/content_settings_client.h

-// Copyright (c) 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_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_CLIENT_H_
-#define COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_CLIENT_H_
-
-#include <string>
-
-#include "base/macros.h"
-#include "base/strings/string16.h"
-#include "net/cookies/canonical_cookie.h"
-
-class GURL;
-class LocalSharedObjectsCounter;
-
-namespace net {
-class CookieOptions;
-}
-
-namespace content_settings {
-
-// An abstraction of operations that depend on the embedder (e.g. Chrome).
-class ContentSettingsClient {
- public:
-  enum AccessType { BLOCKED, ALLOWED };
-
-  ContentSettingsClient() {}
-  virtual ~ContentSettingsClient() {}
-
-  // Methods to notify the client about access to local shared objects.
-  virtual void OnCookiesRead(const GURL& url,
-                             const GURL& first_party_url,
-                             const net::CookieList& cookie_list,
-                             bool blocked_by_policy) = 0;
-
-  virtual void OnCookieChanged(const GURL& url,
-                               const GURL& first_party_url,
-                               const std::string& cookie_line,
-                               const net::CookieOptions& options,
-                               bool blocked_by_policy) = 0;
-
-  virtual void OnFileSystemAccessed(const GURL& url,
-                                    bool blocked_by_policy) = 0;
-
-  virtual void OnIndexedDBAccessed(const GURL& url,
-                                   const base::string16& description,
-                                   bool blocked_by_policy) = 0;
-
-  virtual void OnLocalStorageAccessed(const GURL& url,
-                                      bool local,
-                                      bool blocked_by_policy) = 0;
-
-  virtual void OnWebDatabaseAccessed(const GURL& url,
-                                     const base::string16& name,
-                                     const base::string16& display_name,
-                                     bool blocked_by_policy) = 0;
-
-  // Returns the |LocalSharedObjectsCounter| instances corresponding to all
-  // allowed (or blocked, depending on |type|) local shared objects.
-  virtual const LocalSharedObjectsCounter& local_shared_objects(
-      AccessType type) const = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ContentSettingsClient);
-};
-
-}  // namespace content_settings
-
-#endif  // COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_CLIENT_H_