[sql] Stats gathering for sql/ APIs.

sql/proxy.h

+// Copyright (c) 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 SQL_PROXY_H_
+#define SQL_PROXY_H_
+
+#include "sql/sql_export.h"
+#include "third_party/sqlite/sqlite3.h"
+
+// TODO(shess): third_party/sqlite does not track component build correctly, so
+// each shared library gets a private copy of everything, so sqlite3_* calls
+// outside of the main sql/ component don't work right.  Hack around this by
+// adding pass-through functions while I land a separate fix for the component
+// issue.
+
+// http://crbug.com/489444
+
+namespace sql {
+
+SQL_EXPORT int sqlite3_create_function_v2(
+    sqlite3 *db,
+    const char *zFunctionName,
+    int nArg,
+    int eTextRep,
+    void *pApp,
+    void (*xFunc)(sqlite3_context*,int,sqlite3_value**),
+    void (*xStep)(sqlite3_context*,int,sqlite3_value**),
+    void (*xFinal)(sqlite3_context*),
+    void (*xDestroy)(void*));
+SQL_EXPORT void *sqlite3_commit_hook(sqlite3*, int(*)(void*), void*);
+
+}  // namespace sql
+
+#endif  // SQL_PROXY_H_