Add the Copresence API.

chrome/browser/extensions/api/copresence/copresence_translations.h

Index: chrome/browser/extensions/api/copresence/copresence_translations.h
diff --git a/chrome/browser/extensions/api/copresence/copresence_translations.h b/chrome/browser/extensions/api/copresence/copresence_translations.h
new file mode 100644
index 0000000000000000000000000000000000000000..3888b756392d3890066b90aaee06521b7e12c435
--- /dev/null
+++ b/chrome/browser/extensions/api/copresence/copresence_translations.h
@@ -0,0 +1,44 @@
+// 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 CHROME_BROWSER_EXTENSIONS_API_COPRESENCE_COPRESENCE_TRANSLATIONS_H_
+#define CHROME_BROWSER_EXTENSIONS_API_COPRESENCE_COPRESENCE_TRANSLATIONS_H_
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/macros.h"
+#include "base/memory/linked_ptr.h"
+#include "components/copresence/proto/enums.pb.h"
+
+namespace copresence {
+class ReportRequest;
+}
+
+namespace extensions {
+
+namespace api {
+namespace copresence {
+struct Operation;
+struct PublishOperation;
+struct SubscribeOperation;
+}
+}
+
+// A 1-1 map of of which app a subscription id belongs to.
+// Key = subscription, value = app_id.
+typedef std::map<std::string, std::string> SubscriptionToAppMap;
+
+// Returns report request protocol buffer containing all the operations in the
+// given vector. If parsing any of the operations fails, we return false.
+bool PrepareReportRequestProto(
+    const std::vector<linked_ptr<api::copresence::Operation> >& operations,
+    const std::string& app_id,
+    SubscriptionToAppMap* apps_by_subscription_id,
+    copresence::ReportRequest* request);
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_COPRESENCE_COPRESENCE_TRANSLATIONS_H_