mandoline filesystem: add a sqlite3 vfs to proxy filesystem usage.

sql/BUILD.gn

 # 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.
 
 import("//testing/test.gni")
 
 component("sql") {
   sources = [
     "connection.cc",
     "connection.h",
@@ skipping 36 matching lines @@
   ]
 
   deps = [
     ":sql",
     "//base",
     "//testing/gtest",
     "//third_party/sqlite",
   ]
 }
 
+source_set("redirection_header") {
+  # This target exists because we need a way to switch between
+  # "test/sql_test_base.h" and "mojo/sql_test_base.h" at compile time, to allow
+  # us to switch out the gtest vs mojo:apptest frameworks.
+  check_includes = false
+
+  sources = [
+    "correct_sql_test_base.h",
+  ]
+}
+
 test("sql_unittests") {
   sources = [
     "connection_unittest.cc",
     "meta_table_unittest.cc",
     "recovery_unittest.cc",
     "sqlite_features_unittest.cc",
     "statement_unittest.cc",
     "test/paths.cc",
     "test/paths.h",
     "test/run_all_unittests.cc",
+    "test/sql_test_base.cc",
+    "test/sql_test_base.h",
     "test/sql_test_suite.cc",
     "test/sql_test_suite.h",
     "transaction_unittest.cc",
   ]
 
   # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   deps = [
     ":sql",
+    ":redirection_header",
     ":test_support",
     "//base/allocator",
     "//base/test:test_support",
     "//testing/gtest",
     "//third_party/sqlite",
   ]
 
   if (is_android) {
     isolate_file = "sql_unittests.isolate"
   }
@@ skipping 11 matching lines @@
   #'target_name': 'sql_unittests_apk',
   #'type': 'none',
   #'dependencies': [
   #  'sql_unittests',
   #],
   #'variables': {
   #  'test_suite_name': 'sql_unittests',
   #},
   #'includes': [ '../build/apk_test.gypi' ],
 }