android: Java-based launcher thread

base/test/android/java_handler_thread_for_testing.h

 // Copyright 2016 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_ANDROID_JAVA_HANDLER_THREAD_FOR_TESTING_H_
 #define BASE_ANDROID_JAVA_HANDLER_THREAD_FOR_TESTING_H_
 
+#include <memory>
+
 #include "base/android/java_handler_thread.h"
 #include "base/android/java_message_handler_factory.h"
 #include "base/message_loop/message_loop.h"
 #include "base/test/android/test_system_message_handler_link_android.h"
 
 namespace base {
 
 namespace android {
 
 // Factory class for creating a custom Java-side message handler.
@@ skipping 11 matching lines @@
 // Test-version of JavaHandlerThread, we need this class to start and stop the
 // message loop of the new thread in a different way than JavaHandlerThread
 // does.
 // This is partly because we need to create a test-only java-side message
 // handler to back the native message loop, and partly because our tests cause
 // the corresponding message pump to abort which means it won't reach its idle
 // work state and thus can't quit when idle. We here stop the pump more abruptly
 // instead.
 class JavaHandlerThreadForTesting : public JavaHandlerThread {
  public:
-  JavaHandlerThreadForTesting(const char* name,
-                              base::WaitableEvent* test_done_event);
   ~JavaHandlerThreadForTesting() override;
 
+  static std::unique_ptr<JavaHandlerThreadForTesting> Create(
+      const char* name,
+      base::WaitableEvent* test_done_event);
+  // Create the Java peer first and test that it works before connecting to the
+  // native object.
+  static std::unique_ptr<JavaHandlerThreadForTesting> CreateJavaFirst(
+      base::WaitableEvent* test_done_event);
+
   void StartMessageLoop() override;
   void StopMessageLoop() override;
 
  private:
+  JavaHandlerThreadForTesting(const char* name,
+                              base::WaitableEvent* test_done_event);
+  explicit JavaHandlerThreadForTesting(base::WaitableEvent* test_done_event);
+
   std::unique_ptr<JavaMessageHandlerFactory> message_handler_factory_;
   base::WaitableEvent* test_done_event_;
 };
 
 }  // namespace android
 }  // namespace base
 
 #endif  // BASE_ANDROID_JAVA_HANDLER_THREAD_FOR_TESTING_H_