Reland of Linux: Disable DBus auto-launch

base/trace_event/memory_dump_manager_test_utils.h

+// Copyright 2017 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 BASE_TRACE_EVENT_MEMORY_DUMP_MANAGER_TEST_UTILS_H_
+#define BASE_TRACE_EVENT_MEMORY_DUMP_MANAGER_TEST_UTILS_H_
+
+#include "base/bind.h"
+#include "base/trace_event/memory_dump_manager.h"
+#include "base/trace_event/memory_dump_request_args.h"
+
+namespace base {
+namespace trace_event {
+
+// Short-circuit the RequestGlobalDump() calls to CreateProcessDump().
+// Rationale: only the in-process logic is required for unittests.
+void RequestGlobalDumpForInProcessTesting(
+    const MemoryDumpRequestArgs& args,
+    const GlobalMemoryDumpCallback& global_callback) {
+  // Turns a ProcessMemoryDumpCallback into a GlobalMemoryDumpCallback.
+  auto callback_adapter = [](const GlobalMemoryDumpCallback& global_callback,
+                             uint64_t dump_guid, bool success,
+                             const Optional<MemoryDumpCallbackResult>& result) {
+    if (!global_callback.is_null())
+      global_callback.Run(dump_guid, success);
+  };
+  MemoryDumpManager::GetInstance()->CreateProcessDump(
+      args, Bind(callback_adapter, global_callback));
+};
+
+// Short circuits the RequestGlobalDumpFunction() to CreateProcessDump(),
+// effectively allowing to use both in unittests with the same behavior.
+// Unittests are in-process only and don't require all the multi-process
+// dump handshaking (which would require bits outside of base).
+void InitializeMemoryDumpManagerForInProcessTesting(bool is_coordinator) {
+  MemoryDumpManager* instance = MemoryDumpManager::GetInstance();
+  instance->set_dumper_registrations_ignored_for_testing(true);
+  instance->Initialize(BindRepeating(&RequestGlobalDumpForInProcessTesting),
+                       is_coordinator);
+  instance->set_dumper_registrations_ignored_for_testing(false);
+}
+
+}  // namespace trace_event
+}  // namespace base
+
+#endif  // BASE_TRACE_EVENT_MEMORY_DUMP_MANAGER_TEST_UTILS_H_