Introduce ContentSettingsClient interface

components/content_settings/core/browser/stub_local_shared_objects_counter.h

Index: components/content_settings/core/browser/stub_local_shared_objects_counter.h
diff --git a/components/content_settings/core/browser/stub_local_shared_objects_counter.h b/components/content_settings/core/browser/stub_local_shared_objects_counter.h
new file mode 100644
index 0000000000000000000000000000000000000000..fb022b8a9f307b644d2c5f50bd671b14487b968e
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+++ b/components/content_settings/core/browser/stub_local_shared_objects_counter.h
@@ -0,0 +1,29 @@
+// 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_STUB_LOCAL_SHARED_OBJECT_COUNTER_H_
+#define COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_STUB_LOCAL_SHARED_OBJECT_COUNTER_H_
+
+#include "components/content_settings/core/browser/local_shared_objects_counter.h"
+
+namespace content_settings {
+
+// For test code only, to avoid the need to stub unneeded pure virtual methods
+// of LocalSharedObjectsCounter .
+class StubLocalSharedObjectsCounter : public LocalSharedObjectsCounter {
+ public:
+  StubLocalSharedObjectsCounter();
+  virtual ~StubLocalSharedObjectsCounter();
+
+  virtual size_t GetObjectCount() const override;
+
+  virtual size_t GetObjectCountForDomain(const GURL& url) const override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(StubLocalSharedObjectsCounter);
+};
+
+}  // namespace content_settings
+
+#endif  // COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_STUB_LOCAL_SHARED_OBJECT_COUNTER_H_