Include tab IDs when reporting data use accounting.

components/data_usage/core/data_use_annotator.h

Index: components/data_usage/core/data_use_annotator.h
diff --git a/components/data_usage/core/data_use_annotator.h b/components/data_usage/core/data_use_annotator.h
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+++ b/components/data_usage/core/data_use_annotator.h
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+// Copyright 2015 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_DATA_USAGE_CORE_DATA_USE_ANNOTATOR_H_
+#define COMPONENTS_DATA_USAGE_CORE_DATA_USE_ANNOTATOR_H_
+
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace net {
+class URLRequest;
+}
+
+namespace data_usage {
+
+struct DataUse;
+
+// Interface for an object that can annotate DataUse objects with additional
+// information.
+class DataUseAnnotator {
+ public:
+  typedef base::Callback<void(scoped_ptr<DataUse>)> DataUseConsumerCallback;
+
+  virtual ~DataUseAnnotator() {}
+
+  // Annotate |data_use| with additional information, possibly from |request|,
+  // before passing the annotated |data_use| to |callback|. |request| is passed
+  // in as a non-const pointer so that the DataUseAnnotator can add UserData on
+  // to the |request| if desired.
+  virtual void Annotate(net::URLRequest* request,
+                        scoped_ptr<DataUse> data_use,
+                        const DataUseConsumerCallback& callback) = 0;
+};
+
+}  // namespace data_usage
+
+#endif  // COMPONENTS_DATA_USAGE_CORE_DATA_USE_ANNOTATOR_H_