cros_healthd: start service connection on startup

This change creates a connection with the cros_healthd service factory
when the service connection is created. This will eventually allow
Chrome services (NetworkHealth and NetworkDiagnostics) to be passed to
cros_healthd when Chrome starts.

Bug: chromium:1057739
Change-Id: I0b2142d40adeac4d1991b22642b4555acbf31b97
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2303362
Commit-Queue: Trent Begin <tbegin@chromium.org>
Reviewed-by: Paul Moy <pmoy@chromium.org>
Reviewed-by: Jesse Schettler <jschettler@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791845}

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

@@ -165,6 +165,7 @@
 #include "chromeos/network/network_cert_loader.h"
 #include "chromeos/network/network_handler.h"
 #include "chromeos/network/portal_detector/network_portal_detector_stub.h"
+#include "chromeos/services/cros_healthd/public/cpp/service_connection.h"
 #include "chromeos/system/statistics_provider.h"
 #include "chromeos/tpm/install_attributes.h"
 #include "chromeos/tpm/tpm_token_loader.h"
@@ -903,6 +904,11 @@ void ChromeBrowserMainPartsChromeos::PostProfileInit() {
       network_health::NetworkHealthService::GetInstance();
   DCHECK(network_health_service);
 
+  // Create the service connection to cros_healthd.
+  cros_healthd::ServiceConnection* cros_healthd =
+      cros_healthd::ServiceConnection::GetInstance();
+  DCHECK(cros_healthd);
+
   // Initialize input methods.
   input_method::InputMethodManager* manager =
       input_method::InputMethodManager::Get();

chromeos/dbus/cros_healthd/cros_healthd_client.cc

@@ -31,7 +31,7 @@ class CrosHealthdClientImpl : public CrosHealthdClient {
   // CrosHealthdClient overrides:
   mojo::Remote<cros_healthd::mojom::CrosHealthdServiceFactory>
   BootstrapMojoConnection(
-      base::OnceCallback<void(bool success)> result_callback) override {
+      BootstrapMojoConnectionCallback result_callback) override {
     mojo::PlatformChannel platform_channel;
 
     // Prepare a Mojo invitation to send through |platform_channel|.
@@ -79,7 +79,7 @@ class CrosHealthdClientImpl : public CrosHealthdClient {
 
   // Passes the success/failure of |dbus_response| on to |result_callback|.
   void OnBootstrapMojoConnectionResponse(
-      base::OnceCallback<void(bool success)> result_callback,
+      BootstrapMojoConnectionCallback result_callback,
       dbus::Response* const dbus_response) {
     const bool success = dbus_response != nullptr;
     std::move(result_callback).Run(success);

chromeos/dbus/cros_healthd/cros_healthd_client.h

@@ -26,6 +26,9 @@ namespace chromeos {
 // Mojo connection to the cros_healthd daemon.
 class COMPONENT_EXPORT(CROS_HEALTHD) CrosHealthdClient {
  public:
+  using BootstrapMojoConnectionCallback =
+      base::OnceCallback<void(bool success)>;
+
   // Creates and initializes the global instance. |bus| must not be null.
   static void Initialize(dbus::Bus* bus);
 
@@ -39,10 +42,9 @@ class COMPONENT_EXPORT(CROS_HEALTHD) CrosHealthdClient {
   static CrosHealthdClient* Get();
 
   // Uses D-Bus to bootstrap the Mojo connection between the cros_healthd daemon
-  // and the browser. Returns a bound remote
+  // and the browser. Returns a bound remote.
   virtual mojo::Remote<cros_healthd::mojom::CrosHealthdServiceFactory>
-  BootstrapMojoConnection(
-      base::OnceCallback<void(bool success)> result_callback) = 0;
+      BootstrapMojoConnection(BootstrapMojoConnectionCallback) = 0;
 
  protected:
   // Initialize/Shutdown should be used instead.

chromeos/dbus/cros_healthd/fake_cros_healthd_client.cc

@@ -34,7 +34,7 @@ FakeCrosHealthdClient* FakeCrosHealthdClient::Get() {
 
 mojo::Remote<mojom::CrosHealthdServiceFactory>
 FakeCrosHealthdClient::BootstrapMojoConnection(
-    base::OnceCallback<void(bool success)> result_callback) {
+    BootstrapMojoConnectionCallback result_callback) {
   mojo::Remote<mojom::CrosHealthdServiceFactory> remote(
       receiver_.BindNewPipeAndPassRemote());
 

chromeos/dbus/cros_healthd/fake_cros_healthd_client.h

@@ -35,7 +35,7 @@ class COMPONENT_EXPORT(CROS_HEALTHD) FakeCrosHealthdClient
 
   // CrosHealthdClient overrides:
   mojo::Remote<mojom::CrosHealthdServiceFactory> BootstrapMojoConnection(
-      base::OnceCallback<void(bool success)> result_callback) override;
+      BootstrapMojoConnectionCallback result_callback) override;
 
   // Set the list of routines that will be used in the response to any
   // GetAvailableRoutines IPCs received.

chromeos/services/cros_healthd/public/cpp/service_connection.cc

@@ -115,7 +115,7 @@ class ServiceConnectionImpl : public ServiceConnection {
   // Binds the factory interface |cros_healthd_service_factory_| to an
   // implementation in the cros_healthd daemon, if it is not already bound. The
   // binding is accomplished via D-Bus bootstrap.
-  void BindCrosHealthdServiceFactoryIfNeeded();
+  void EnsureCrosHealthdServiceFactoryIsBound();
 
   // Uses |cros_healthd_service_factory_| to bind the diagnostics service remote
   // to an implementation in the cros_healethd daemon, if it is not already
@@ -346,26 +346,30 @@ void ServiceConnectionImpl::ProbeProcessInfo(
 void ServiceConnectionImpl::GetDiagnosticsService(
     mojom::CrosHealthdDiagnosticsServiceRequest service) {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
-  BindCrosHealthdServiceFactoryIfNeeded();
+  EnsureCrosHealthdServiceFactoryIsBound();
   cros_healthd_service_factory_->GetDiagnosticsService(std::move(service));
 }
 
 void ServiceConnectionImpl::GetProbeService(
     mojom::CrosHealthdProbeServiceRequest service) {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
-  BindCrosHealthdServiceFactoryIfNeeded();
+  EnsureCrosHealthdServiceFactoryIsBound();
   cros_healthd_service_factory_->GetProbeService(std::move(service));
 }
 
-void ServiceConnectionImpl::BindCrosHealthdServiceFactoryIfNeeded() {
+void ServiceConnectionImpl::EnsureCrosHealthdServiceFactoryIsBound() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   if (cros_healthd_service_factory_.is_bound())
     return;
 
-  cros_healthd_service_factory_ =
-      CrosHealthdClient::Get()->BootstrapMojoConnection(base::BindOnce(
-          &ServiceConnectionImpl::OnBootstrapMojoConnectionResponse,
+  auto* client = CrosHealthdClient::Get();
+  if (!client)
+    return;
+
+  cros_healthd_service_factory_ = client->BootstrapMojoConnection(
+      base::BindOnce(&ServiceConnectionImpl::OnBootstrapMojoConnectionResponse,
                      base::Unretained(this)));
+
   cros_healthd_service_factory_.set_disconnect_handler(base::BindOnce(
       &ServiceConnectionImpl::OnDisconnect, base::Unretained(this)));
 }
@@ -375,7 +379,7 @@ void ServiceConnectionImpl::BindCrosHealthdDiagnosticsServiceIfNeeded() {
   if (cros_healthd_diagnostics_service_.is_bound())
     return;
 
-  BindCrosHealthdServiceFactoryIfNeeded();
+  EnsureCrosHealthdServiceFactoryIsBound();
   cros_healthd_service_factory_->GetDiagnosticsService(
       cros_healthd_diagnostics_service_.BindNewPipeAndPassReceiver());
   cros_healthd_diagnostics_service_.set_disconnect_handler(base::BindOnce(
@@ -387,7 +391,7 @@ void ServiceConnectionImpl::BindCrosHealthdEventServiceIfNeeded() {
   if (cros_healthd_event_service_.is_bound())
     return;
 
-  BindCrosHealthdServiceFactoryIfNeeded();
+  EnsureCrosHealthdServiceFactoryIsBound();
   cros_healthd_service_factory_->GetEventService(
       cros_healthd_event_service_.BindNewPipeAndPassReceiver());
   cros_healthd_event_service_.set_disconnect_handler(base::BindOnce(
@@ -399,7 +403,7 @@ void ServiceConnectionImpl::BindCrosHealthdProbeServiceIfNeeded() {
   if (cros_healthd_probe_service_.is_bound())
     return;
 
-  BindCrosHealthdServiceFactoryIfNeeded();
+  EnsureCrosHealthdServiceFactoryIsBound();
   cros_healthd_service_factory_->GetProbeService(
       cros_healthd_probe_service_.BindNewPipeAndPassReceiver());
   cros_healthd_probe_service_.set_disconnect_handler(base::BindOnce(
@@ -408,6 +412,7 @@ void ServiceConnectionImpl::BindCrosHealthdProbeServiceIfNeeded() {
 
 ServiceConnectionImpl::ServiceConnectionImpl() {
   DETACH_FROM_SEQUENCE(sequence_checker_);
+  EnsureCrosHealthdServiceFactoryIsBound();
 }
 
 void ServiceConnectionImpl::OnDisconnect() {
@@ -418,6 +423,8 @@ void ServiceConnectionImpl::OnDisconnect() {
   cros_healthd_probe_service_.reset();
   cros_healthd_diagnostics_service_.reset();
   cros_healthd_event_service_.reset();
+
+  EnsureCrosHealthdServiceFactoryIsBound();
 }
 
 void ServiceConnectionImpl::OnBootstrapMojoConnectionResponse(

chromeos/services/cros_healthd/public/cpp/service_connection_unittest.cc

@@ -451,6 +451,7 @@ TEST_F(CrosHealthdServiceConnectionTest, AddPowerObserver) {
   run_loop.Run();
 }
 
+// Test that we can probe telemetry info.
 TEST_F(CrosHealthdServiceConnectionTest, ProbeTelemetryInfo) {
   auto response = mojom::TelemetryInfo::New();
   FakeCrosHealthdClient::Get()->SetProbeTelemetryInfoResponseForTesting(