wilco_dtc_supportd: start mojo bridge if enabled

WilcoDtcSupportdBridge should be started regardless of the result of
Wilco DTC upstart job, since if the wilco DTC was already running, the
job returns an error.

BUG=b:132311683
TEST=local device

Change-Id: I2f697ee4ae600ffc7d2b33c6cd90ffd8d8ab9121
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1602723Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Commit-Queue: Polina Bondarenko <pbond@chromium.org>
Auto-Submit: Polina Bondarenko <pbond@chromium.org>
Cr-Commit-Position: refs/heads/master@{#658532}

chrome/browser/chromeos/wilco_dtc_supportd/wilco_dtc_supportd_manager.cc

@@ -161,12 +161,15 @@ void WilcoDtcSupportdManager::StopWilcoDtc(WilcoDtcCallback callback) {
 }
 
 void WilcoDtcSupportdManager::OnStartWilcoDtc(bool success) {
-  if (!success) {
-    DLOG(ERROR) << "Failed to start the wilco DTC";
-  } else {
+  if (!success)
+    DLOG(ERROR) << "Failed to start the wilco DTC, it might be already running";
+  else
     VLOG(1) << "Wilco DTC started";
-    if (!wilco_dtc_supportd_bridge_)
-      wilco_dtc_supportd_bridge_ = delegate_->CreateWilcoDtcSupportdBridge();
+
+  // The bridge has to be created regardless of a |success| value. When wilco
+  // DTC is already running, it responds with an error on attempt to start it.
+  if (!wilco_dtc_supportd_bridge_) {
+    wilco_dtc_supportd_bridge_ = delegate_->CreateWilcoDtcSupportdBridge();
     DCHECK(wilco_dtc_supportd_bridge_);
 
     // Once the bridge is created, notify it about an available configuration

chrome/browser/chromeos/wilco_dtc_supportd/wilco_dtc_supportd_manager_unittest.cc

@@ -38,12 +38,18 @@ class TestUpstartClient final : public FakeUpstartClient {
   // FakeUpstartClient overrides:
   void StartWilcoDtcService(
       chromeos::VoidDBusMethodCallback callback) override {
-    std::move(callback).Run(true /* success */);
+    std::move(callback).Run(result_);
   }
 
   void StopWilcoDtcService(chromeos::VoidDBusMethodCallback callback) override {
-    std::move(callback).Run(true /* success */);
+    std::move(callback).Run(result_);
   }
+
+  // Sets the result to be passed into callbacks.
+  void set_result(bool result) { result_ = result; }
+
+ private:
+  bool result_ = true;
 };
 
 class MockMojoWilcoDtcSupportdService
@@ -118,6 +124,10 @@ class WilcoDtcSupportdManagerTest : public testing::Test {
     return &mojo_wilco_dtc_supportd_service_;
   }
 
+  void SetUpstartClientResult(bool result) {
+    upstart_client_->set_result(result);
+  }
+
  private:
   base::MessageLoop message_loop_;
   ScopedTestingCrosSettings scoped_testing_cros_settings_;
@@ -240,6 +250,16 @@ TEST_F(WilcoDtcSupportdManagerTest, ConfigurationData) {
   }
 }
 
+// Test that Mojo bridge has been started even if the wilco DTC support
+// services were already running.
+TEST_F(WilcoDtcSupportdManagerTest, RunningUpstartJob) {
+  SetWilcoDtcAllowedPolicy(true);
+  SetUpstartClientResult(false);
+  WilcoDtcSupportdManager wilco_dtc_supportd_manager(CreateDelegate());
+
+  EXPECT_TRUE(WilcoDtcSupportdBridge::Get());
+}
+
 }  // namespace
 
 }  // namespace chromeos