gpu: Replace GpuHostMsg_Initialized with mojom api.

content/gpu/gpu_child_thread.cc

Index: content/gpu/gpu_child_thread.cc
diff --git a/content/gpu/gpu_child_thread.cc b/content/gpu/gpu_child_thread.cc
index 3ca7566708ee572092579f7ddfafb65739c7a6d8..ee298d1e961d7638fbdf82c1706b29f94b78704a 100644
--- a/content/gpu/gpu_child_thread.cc
+++ b/content/gpu/gpu_child_thread.cc
@@ -268,8 +268,6 @@ void GpuChildThread::CreateGpuService(
     mojo::ScopedSharedBufferHandle activity_flags) {
   gpu_service_->Bind(std::move(request));
   gpu_service_->UpdateGPUInfoFromPreferences(gpu_preferences);
-  Send(new GpuHostMsg_Initialized(!dead_on_arrival_, gpu_service_->gpu_info(),
-                                  gpu_service_->gpu_feature_info()));
   for (const LogMessage& log : deferred_messages_)
     gpu_host->RecordLogMessage(log.severity, log.header, log.message);
   deferred_messages_.clear();