Completed the code path from AndroidProviderService to HistoryBackend.

chrome/browser/history/history_marshaling_android.h

Index: chrome/browser/history/history_marshaling_android.h
diff --git a/chrome/browser/history/history_marshaling_android.h b/chrome/browser/history/history_marshaling_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..2f6fc14b35dde4f264c85d51408fd9b796526742
--- /dev/null
+++ b/chrome/browser/history/history_marshaling_android.h
@@ -0,0 +1,30 @@
+// Copyright (c) 2012 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.
+
+// Data structures for communication between the history service on the main
+// thread and the backend on the history thread.
+
+#ifndef CHROME_BROWSER_HISTORY_HISTORY_MARSHALING_ANDROID_H_
+#define CHROME_BROWSER_HISTORY_HISTORY_MARSHALING_ANDROID_H_
+#pragma once
+
+#include "chrome/browser/cancelable_request.h"
+#include "chrome/browser/history/android/android_history_provider_service.h"
+
+namespace history {
+
+typedef CancelableRequest<AndroidHistoryProviderService::InsertCallback>
+    InsertRequest;
+typedef CancelableRequest<AndroidHistoryProviderService::QueryCallback>
+    QueryRequest;
+typedef CancelableRequest<AndroidHistoryProviderService::UpdateCallback>
+    UpdateRequest;
+typedef CancelableRequest<AndroidHistoryProviderService::DeleteCallback>
+    DeleteRequest;
+typedef CancelableRequest<AndroidHistoryProviderService::MoveStatementCallback>
+    MoveStatementRequest;
+
+}  // namespace history
+
+#endif  // CHROME_BROWSER_HISTORY_HISTORY_MARSHALING_ANDROID_H_