Add DEPS include rules so we don't accidentally use base

ppapi/tests/test_utils.h

 // Copyright (c) 2011 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 PPAPI_TESTS_TEST_UTILS_H_
 #define PPAPI_TESTS_TEST_UTILS_H_
 
 #include <string>
 
 #include "ppapi/c/dev/ppb_testing_dev.h"
@@ skipping 31 matching lines @@
   static void Handler(void* user_data, int32_t result);
 
   bool have_result_;
   int32_t result_;
   bool force_async_;
   bool post_quit_task_;
   unsigned run_count_;
   PP_Instance instance_;
 };
 
+// This is roughly copied from base/compiler_specific.h, and makes it possible
+// to pass 'this' in a constructor initializer list, when you really mean it.
+//
+// Example usage:
+// Foo::Foo(MyInstance* instance)
+//     : ALLOW_THIS_IN_INITIALIZER_LIST(callback_factory_(this)) {}
+#if defined(COMPILER_MSVC)
+#define PP_ALLOW_THIS_IN_INITIALIZER_LIST(code) \
+    __pragma(warning(push)) \
+    __pragma(warning(disable:4355)) \
+    code \
+    __pragma(warning(pop))
+#else
+#define PP_ALLOW_THIS_IN_INITIALIZER_LIST(code) code
+#endif
+
 #endif  // PPAPI_TESTS_TEST_UTILS_H_