Revert "update_engine: Update libchrome APIS to r456626."

This reverts commit 663ff4b30b9f629a130ef6d357d462b897d4071e.

Reason for revert: Broke the mac_sdk
Exempt-From-Owner-Approval: Fixing mac_sdk

Change-Id: I8184ec58e74d62dca0deafb39340d4bd36bf40e0
diff --git a/common/hwid_override_unittest.cc b/common/hwid_override_unittest.cc
index da6f367..26ef30a 100644
--- a/common/hwid_override_unittest.cc
+++ b/common/hwid_override_unittest.cc
@@ -32,7 +32,7 @@
 
   void SetUp() override {
     ASSERT_TRUE(tempdir_.CreateUniqueTempDir());
-    ASSERT_TRUE(base::CreateDirectory(tempdir_.GetPath().Append("etc")));
+    ASSERT_TRUE(base::CreateDirectory(tempdir_.path().Append("etc")));
   }
 
  protected:
@@ -46,22 +46,22 @@
   std::string expected_hwid("expected");
   std::string keyval(HwidOverride::kHwidOverrideKey);
   keyval += ("=" + expected_hwid);
-  ASSERT_EQ(base::WriteFile(tempdir_.GetPath().Append("etc/lsb-release"),
+  ASSERT_EQ(base::WriteFile(tempdir_.path().Append("etc/lsb-release"),
                             keyval.c_str(), keyval.length()),
             static_cast<int>(keyval.length()));
-  EXPECT_EQ(expected_hwid, HwidOverride::Read(tempdir_.GetPath()));
+  EXPECT_EQ(expected_hwid, HwidOverride::Read(tempdir_.path()));
 }
 
 TEST_F(HwidOverrideTest, ReadNothing) {
   std::string keyval("SOMETHING_ELSE=UNINTERESTING");
-  ASSERT_EQ(base::WriteFile(tempdir_.GetPath().Append("etc/lsb-release"),
+  ASSERT_EQ(base::WriteFile(tempdir_.path().Append("etc/lsb-release"),
                             keyval.c_str(), keyval.length()),
             static_cast<int>(keyval.length()));
-  EXPECT_EQ(std::string(), HwidOverride::Read(tempdir_.GetPath()));
+  EXPECT_EQ(std::string(), HwidOverride::Read(tempdir_.path()));
 }
 
 TEST_F(HwidOverrideTest, ReadFailure) {
-  EXPECT_EQ(std::string(), HwidOverride::Read(tempdir_.GetPath()));
+  EXPECT_EQ(std::string(), HwidOverride::Read(tempdir_.path()));
 }
 
 }  // namespace chromeos_update_engine