Introduce ContentSettingsClient interface

components/content_settings/core/browser/content_settings_client.h

Index: components/content_settings/core/browser/content_settings_client.h
diff --git a/components/content_settings/core/browser/content_settings_client.h b/components/content_settings/core/browser/content_settings_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..1bda2439b8d8772e10177c150faf2f9239a5da60
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+++ b/components/content_settings/core/browser/content_settings_client.h
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+// 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/basictypes.h"
+#include "base/strings/string16.h"
+
+class GURL;
+class LocalSharedObjectsCounter;
+
+namespace net {
+class CookieList;
+class CookieOptions;
+}
+
+namespace content_settings {
+
+// An abstraction of operations that depend on the embedder (e.g. Chrome).
+// For mock / testing implementation in tests you can inherit from
+// StubContentSettingsClient instead to avoid the need to stub unneeded pure
+// virtual methods.
+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_