[Ozone] Update GPUTestHelper to properly use the message filter

ui/ozone/public/ozone_gpu_test_helper.cc

Index: ui/ozone/public/ozone_gpu_test_helper.cc
diff --git a/ui/ozone/public/ozone_gpu_test_helper.cc b/ui/ozone/public/ozone_gpu_test_helper.cc
index 8490a322c2f638e931060326296115412ef864c6..fe5a17b31cdb9775f7337863131e9ac4c3f14c02 100644
--- a/ui/ozone/public/ozone_gpu_test_helper.cc
+++ b/ui/ozone/public/ozone_gpu_test_helper.cc
@@ -19,15 +19,36 @@ namespace {
 
 const int kGpuProcessHostId = 1;
 
-}  // namespace
-
-static void DispatchToGpuPlatformSupportHostTask(IPC::Message* msg) {
+void DispatchToGpuPlatformSupportHostTask(IPC::Message* msg) {
   ui::OzonePlatform::GetInstance()
       ->GetGpuPlatformSupportHost()
       ->OnMessageReceived(*msg);
   delete msg;
 }
 
+void DispatchToGpuPlatformSupportTask(IPC::Message* msg) {
+  ui::OzonePlatform::GetInstance()->GetGpuPlatformSupport()->OnMessageReceived(
+      *msg);
+  delete msg;
+}
+
+void DispatchToGpuPlatformSupportTaskOnIO(
+    const scoped_refptr<base::SingleThreadTaskRunner>& gpu_task_runner,
+    IPC::Message* msg) {
+  IPC::MessageFilter* filter = ui::OzonePlatform::GetInstance()
+                                   ->GetGpuPlatformSupport()
+                                   ->GetMessageFilter();
+  if (filter && filter->OnMessageReceived(*msg)) {
+    delete msg;
+    return;
+  }
+
+  gpu_task_runner->PostTask(FROM_HERE,
+                            base::Bind(DispatchToGpuPlatformSupportTask, msg));
+}
+
+}  // namespace
+
 class FakeGpuProcess : public IPC::Sender {
  public:
   FakeGpuProcess(
@@ -60,30 +81,27 @@ class FakeGpuProcess : public IPC::Sender {
   scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
 };
 
-static void DispatchToGpuPlatformSupportTask(IPC::Message* msg) {
-  ui::OzonePlatform::GetInstance()->GetGpuPlatformSupport()->OnMessageReceived(
-      *msg);
-  delete msg;
-}
-
 class FakeGpuProcessHost {
  public:
   FakeGpuProcessHost(
-      const scoped_refptr<base::SingleThreadTaskRunner>& gpu_task_runner)
-      : gpu_task_runner_(gpu_task_runner) {}
+      const scoped_refptr<base::SingleThreadTaskRunner>& gpu_task_runner,
+      const scoped_refptr<base::SingleThreadTaskRunner>& gpu_io_task_runner)
+      : gpu_task_runner_(gpu_task_runner),
+        gpu_io_task_runner_(gpu_io_task_runner) {}
   ~FakeGpuProcessHost() {}
 
   void Init() {
     base::Callback<void(IPC::Message*)> sender =
-        base::Bind(&DispatchToGpuPlatformSupportTask);
+        base::Bind(&DispatchToGpuPlatformSupportTaskOnIO, gpu_task_runner_);
 
     ui::OzonePlatform::GetInstance()
         ->GetGpuPlatformSupportHost()
-        ->OnChannelEstablished(kGpuProcessHostId, gpu_task_runner_, sender);
+        ->OnChannelEstablished(kGpuProcessHostId, gpu_io_task_runner_, sender);
   }
 
  private:
   scoped_refptr<base::SingleThreadTaskRunner> gpu_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> gpu_io_task_runner_;
 };
 
 OzoneGpuTestHelper::OzoneGpuTestHelper() {
@@ -106,7 +124,8 @@ bool OzoneGpuTestHelper::Initialize(
                             base::Unretained(fake_gpu_process_.get())));
   fake_gpu_process_->Init();
 
-  fake_gpu_process_host_.reset(new FakeGpuProcessHost(gpu_task_runner));
+  fake_gpu_process_host_.reset(new FakeGpuProcessHost(
+      gpu_task_runner, io_helper_thread_->task_runner()));
   fake_gpu_process_host_->Init();
 
   return true;