Remove references of MessageLoopForIO in /fuchsia

MessageLoopForIO will go away soon use ScopedTaskEnvironment instead.

ScopedTaskEnvironment will per default start a ThreadPool, which should
be fine in most of the cases. If you believe your test needs to make sure
that no ThreadPool runs let me know and I will update the patch.

BUG=891670
This CL was uploaded by git cl split.

R=scottmg@chromium.org

Change-Id: I6aaf63a8b1094b302aad010f3e48e009fe8a04fc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1733549
Commit-Queue: Wez <wez@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Auto-Submit: Carlos Caballero <carlscab@google.com>
Cr-Commit-Position: refs/heads/master@{#684010}

fuchsia/base/BUILD.gn

@@ -90,6 +90,7 @@ test("cr_fuchsia_base_unittests") {
     "//base",
     "//base:testfidl",
     "//base/test:run_all_unittests",
+    "//base/test:test_support",
     "//testing/gtest",
   ]
 }

fuchsia/base/agent_impl_unittests.cc

@@ -9,7 +9,7 @@
 #include "base/fuchsia/service_directory_client.h"
 #include "base/fuchsia/testfidl/cpp/fidl.h"
 #include "base/logging.h"
-#include "base/message_loop/message_loop.h"
+#include "base/test/scoped_task_environment.h"
 #include "fuchsia/base/fit_adapter.h"
 #include "fuchsia/base/result_receiver.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -100,7 +100,9 @@ class AgentImplTest : public ::testing::Test {
     return nullptr;
   }
 
-  base::MessageLoopForIO message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_{
+      base::test::ScopedTaskEnvironment::ThreadingMode::MAIN_THREAD_ONLY,
+      base::test::ScopedTaskEnvironment::MainThreadType::IO};
   std::unique_ptr<base::fuchsia::ServiceDirectory> services_;
   std::unique_ptr<base::fuchsia::ServiceDirectoryClient> services_client_;
 

fuchsia/engine/context_provider_impl_unittest.cc

@@ -29,9 +29,9 @@
 #include "base/fuchsia/file_utils.h"
 #include "base/fuchsia/fuchsia_logging.h"
 #include "base/fuchsia/service_directory.h"
-#include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/test/multiprocess_test.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/test/test_timeouts.h"
 #include "fuchsia/engine/common.h"
 #include "fuchsia/engine/fake_context.h"
@@ -46,7 +46,9 @@ constexpr char kUrl[] = "chrome://:emorhc";
 constexpr char kTitle[] = "Palindrome";
 
 MULTIPROCESS_TEST_MAIN(SpawnContextServer) {
-  base::MessageLoopForIO message_loop;
+  base::test::ScopedTaskEnvironment scoped_task_environment(
+      base::test::ScopedTaskEnvironment::ThreadingMode::MAIN_THREAD_ONLY,
+      base::test::ScopedTaskEnvironment::MainThreadType::IO);
 
   base::FilePath data_dir;
   CHECK(base::PathService::Get(base::DIR_APP_DATA, &data_dir));
@@ -177,7 +179,9 @@ class ContextProviderImplTest : public base::MultiProcessTest {
   }
 
  protected:
-  base::MessageLoopForIO message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_{
+      base::test::ScopedTaskEnvironment::ThreadingMode::MAIN_THREAD_ONLY,
+      base::test::ScopedTaskEnvironment::MainThreadType::IO};
   std::unique_ptr<ContextProviderImpl> provider_;
   fuchsia::web::ContextProviderPtr provider_ptr_;
   fidl::BindingSet<fuchsia::web::ContextProvider> bindings_;

fuchsia/engine/web_engine_debug_integration_test.cc

@@ -10,6 +10,7 @@
 #include "base/fuchsia/file_utils.h"
 #include "base/fuchsia/service_directory_client.h"
 #include "base/macros.h"
+#include "base/test/scoped_task_environment.h"
 #include "fuchsia/base/fit_adapter.h"
 #include "fuchsia/base/frame_test_util.h"
 #include "fuchsia/base/result_receiver.h"
@@ -93,7 +94,9 @@ class WebEngineDebugIntegrationTest : public testing::Test {
               fuchsia::web::ContextError::REMOTE_DEBUGGING_PORT_NOT_OPENED);
   }
 
-  base::MessageLoopForIO message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_{
+      base::test::ScopedTaskEnvironment::ThreadingMode::MAIN_THREAD_ONLY,
+      base::test::ScopedTaskEnvironment::MainThreadType::IO};
 
   TestDebugListener dev_tools_listener_;
   fidl::Binding<fuchsia::web::DevToolsListener> dev_tools_listener_binding_;

fuchsia/runners/cast/cast_runner_integration_test.cc

@@ -10,9 +10,9 @@
 #include "base/fuchsia/scoped_service_binding.h"
 #include "base/fuchsia/service_directory.h"
 #include "base/fuchsia/service_directory_client.h"
-#include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/test/bind_test_util.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/test/test_timeouts.h"
 #include "base/threading/sequenced_task_runner_handle.h"
 #include "fuchsia/base/agent_impl.h"
@@ -242,7 +242,9 @@ class CastRunnerIntegrationTest : public testing::Test {
   }
 
   const base::RunLoop::ScopedRunTimeoutForTest run_timeout_;
-  base::MessageLoopForIO message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_{
+      base::test::ScopedTaskEnvironment::ThreadingMode::MAIN_THREAD_ONLY,
+      base::test::ScopedTaskEnvironment::MainThreadType::IO};
   net::EmbeddedTestServer test_server_;
 
   // Returns fake Cast application information to the CastRunner.

fuchsia/runners/web/web_runner_smoke_test.cc

@@ -12,6 +12,7 @@
 #include "base/fuchsia/service_directory_client.h"
 #include "base/fuchsia/service_provider_impl.h"
 #include "base/test/bind_test_util.h"
+#include "base/test/scoped_task_environment.h"
 #include "base/test/test_timeouts.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
@@ -84,7 +85,9 @@ class WebRunnerSmokeTest : public testing::Test {
   bool test_html_requested_ = false;
   bool test_image_requested_ = false;
 
-  base::MessageLoopForIO message_loop_;
+  base::test::ScopedTaskEnvironment scoped_task_environment_{
+      base::test::ScopedTaskEnvironment::ThreadingMode::MAIN_THREAD_ONLY,
+      base::test::ScopedTaskEnvironment::MainThreadType::IO};
 
   std::unique_ptr<base::fuchsia::ServiceDirectory> service_directory_;
   std::unique_ptr<base::fuchsia::ServiceProviderImpl> service_provider_;