update_engine: Update unit tests to use unique_ptr for PolicyProvider

The class policy::PolicyProvider from libbrillo has been updated
to accept unique_ptr instead of raw pointer for constructor.

This CL updates the tests to use the new constructor.

The changes in PolicyProvider contructor come from CL
https://chromium-review.googlesource.com/c/aosp/platform/external/libbrillo/+/674935

BUG=chromium:764337
TEST=cros_workon_make --board=${BOARD} chromeos-base/update_engine --test
CQ-DEPEND=CL:674935, CL:819250, CL:819353

Change-Id: I5537cfe9a88053193fbe8b0b6d844c59df148fc9
Reviewed-on: https://chromium-review.googlesource.com/819412
Commit-Ready: Igor <[email protected]>
Tested-by: Igor <[email protected]>
Reviewed-by: Amin Hassani <[email protected]>
Reviewed-by: Sen Jiang <[email protected]>
diff --git a/update_attempter_unittest.cc b/update_attempter_unittest.cc
index ef84c1b..06c82c9 100644
--- a/update_attempter_unittest.cc
+++ b/update_attempter_unittest.cc
@@ -372,10 +372,11 @@
 
   // Expect that the device policy is loaded by the UpdateAttempter at some
   // point by calling RefreshDevicePolicy.
-  policy::MockDevicePolicy* device_policy = new policy::MockDevicePolicy();
-  attempter_.policy_provider_.reset(new policy::PolicyProvider(device_policy));
+  auto device_policy = std::make_unique<policy::MockDevicePolicy>();
   EXPECT_CALL(*device_policy, LoadPolicy())
       .Times(testing::AtLeast(1)).WillRepeatedly(Return(true));
+  attempter_.policy_provider_.reset(
+      new policy::PolicyProvider(std::move(device_policy)));
 
   {
     InSequence s;
@@ -414,11 +415,23 @@
 void UpdateAttempterTest::RollbackTestStart(
     bool enterprise_rollback, bool valid_slot) {
   // Create a device policy so that we can change settings.
-  policy::MockDevicePolicy* device_policy = new policy::MockDevicePolicy();
-  attempter_.policy_provider_.reset(new policy::PolicyProvider(device_policy));
-
+  auto device_policy = std::make_unique<policy::MockDevicePolicy>();
   EXPECT_CALL(*device_policy, LoadPolicy()).WillRepeatedly(Return(true));
-  fake_system_state_.set_device_policy(device_policy);
+  fake_system_state_.set_device_policy(device_policy.get());
+  if (enterprise_rollback) {
+    // We return an empty owner as this is an enterprise.
+    EXPECT_CALL(*device_policy, GetOwner(_)).WillRepeatedly(
+        DoAll(SetArgPointee<0>(string("")),
+        Return(true)));
+  } else {
+    // We return a fake owner as this is an owned consumer device.
+    EXPECT_CALL(*device_policy, GetOwner(_)).WillRepeatedly(
+        DoAll(SetArgPointee<0>(string("[email protected]")),
+        Return(true)));
+  }
+
+  attempter_.policy_provider_.reset(
+      new policy::PolicyProvider(std::move(device_policy)));
 
   if (valid_slot) {
     BootControlInterface::Slot rollback_slot = 1;
@@ -436,18 +449,6 @@
      is_rollback_allowed = true;
   }
 
-  if (enterprise_rollback) {
-    // We return an empty owner as this is an enterprise.
-    EXPECT_CALL(*device_policy, GetOwner(_)).WillRepeatedly(
-        DoAll(SetArgPointee<0>(string("")),
-        Return(true)));
-  } else {
-    // We return a fake owner as this is an owned consumer device.
-    EXPECT_CALL(*device_policy, GetOwner(_)).WillRepeatedly(
-        DoAll(SetArgPointee<0>(string("[email protected]")),
-        Return(true)));
-  }
-
   if (is_rollback_allowed) {
     InSequence s;
     for (size_t i = 0; i < arraysize(kRollbackActionTypes); ++i) {
@@ -718,17 +719,18 @@
 void UpdateAttempterTest::ReadScatterFactorFromPolicyTestStart() {
   int64_t scatter_factor_in_seconds = 36000;
 
-  policy::MockDevicePolicy* device_policy = new policy::MockDevicePolicy();
-  attempter_.policy_provider_.reset(new policy::PolicyProvider(device_policy));
-
+  auto device_policy = std::make_unique<policy::MockDevicePolicy>();
   EXPECT_CALL(*device_policy, LoadPolicy()).WillRepeatedly(Return(true));
-  fake_system_state_.set_device_policy(device_policy);
+  fake_system_state_.set_device_policy(device_policy.get());
 
   EXPECT_CALL(*device_policy, GetScatterFactorInSeconds(_))
       .WillRepeatedly(DoAll(
           SetArgPointee<0>(scatter_factor_in_seconds),
           Return(true)));
 
+  attempter_.policy_provider_.reset(
+      new policy::PolicyProvider(std::move(device_policy)));
+
   attempter_.Update("", "", "", "", false, false);
   EXPECT_EQ(scatter_factor_in_seconds, attempter_.scatter_factor_.InSeconds());
 
@@ -756,17 +758,18 @@
 
   int64_t scatter_factor_in_seconds = 10;
 
-  policy::MockDevicePolicy* device_policy = new policy::MockDevicePolicy();
-  attempter_.policy_provider_.reset(new policy::PolicyProvider(device_policy));
-
+  auto device_policy = std::make_unique<policy::MockDevicePolicy>();
   EXPECT_CALL(*device_policy, LoadPolicy()).WillRepeatedly(Return(true));
-  fake_system_state_.set_device_policy(device_policy);
+  fake_system_state_.set_device_policy(device_policy.get());
 
   EXPECT_CALL(*device_policy, GetScatterFactorInSeconds(_))
       .WillRepeatedly(DoAll(
           SetArgPointee<0>(scatter_factor_in_seconds),
           Return(true)));
 
+  attempter_.policy_provider_.reset(
+      new policy::PolicyProvider(std::move(device_policy)));
+
   attempter_.Update("", "", "", "", false, false);
   EXPECT_EQ(scatter_factor_in_seconds, attempter_.scatter_factor_.InSeconds());
 
@@ -815,17 +818,18 @@
   // otherwise.
   int64_t scatter_factor_in_seconds = 50;
 
-  policy::MockDevicePolicy* device_policy = new policy::MockDevicePolicy();
-  attempter_.policy_provider_.reset(new policy::PolicyProvider(device_policy));
-
+  auto device_policy = std::make_unique<policy::MockDevicePolicy>();
   EXPECT_CALL(*device_policy, LoadPolicy()).WillRepeatedly(Return(true));
-  fake_system_state_.set_device_policy(device_policy);
+  fake_system_state_.set_device_policy(device_policy.get());
 
   EXPECT_CALL(*device_policy, GetScatterFactorInSeconds(_))
       .WillRepeatedly(DoAll(
           SetArgPointee<0>(scatter_factor_in_seconds),
           Return(true)));
 
+  attempter_.policy_provider_.reset(
+      new policy::PolicyProvider(std::move(device_policy)));
+
   // Trigger an interactive check so we can test that scattering is disabled.
   attempter_.Update("", "", "", "", false, true);
   EXPECT_EQ(scatter_factor_in_seconds, attempter_.scatter_factor_.InSeconds());