Move WriteFile and WriteFileDescriptor from file_util to base namespace.

components/policy/core/common/cloud/user_cloud_policy_store_unittest.cc

Index: components/policy/core/common/cloud/user_cloud_policy_store_unittest.cc
diff --git a/components/policy/core/common/cloud/user_cloud_policy_store_unittest.cc b/components/policy/core/common/cloud/user_cloud_policy_store_unittest.cc
index 13142f784da25c8c3c4a1a9377cc1c4a6586af99..6e828bf7ad1856446d5724c43e52781b5e66c2a3 100644
--- a/components/policy/core/common/cloud/user_cloud_policy_store_unittest.cc
+++ b/components/policy/core/common/cloud/user_cloud_policy_store_unittest.cc
@@ -42,7 +42,7 @@ bool WriteStringToFile(const base::FilePath path, const std::string& data) {
   }
 
   int size = data.size();
-  if (file_util::WriteFile(path, data.c_str(), size) != size) {
+  if (base::WriteFile(path, data.c_str(), size) != size) {
     DLOG(WARNING) << "Failed to write " << path.value();
     return false;
   }
@@ -168,9 +168,8 @@ TEST_F(UserCloudPolicyStoreTest, LoadWithInvalidFile) {
   ASSERT_TRUE(base::CreateDirectory(policy_file().DirName()));
   std::string bogus_data = "bogus_data";
   int size = bogus_data.size();
-  ASSERT_EQ(size, file_util::WriteFile(policy_file(),
-                                       bogus_data.c_str(),
-                                       bogus_data.size()));
+  ASSERT_EQ(size, base::WriteFile(policy_file(),
+                                  bogus_data.c_str(), bogus_data.size()));
 
   ExpectError(store_.get(), CloudPolicyStore::STATUS_LOAD_ERROR);
   store_->Load();
@@ -201,9 +200,8 @@ TEST_F(UserCloudPolicyStoreTest, LoadImmediatelyWithInvalidFile) {
   ASSERT_TRUE(base::CreateDirectory(policy_file().DirName()));
   std::string bogus_data = "bogus_data";
   int size = bogus_data.size();
-  ASSERT_EQ(size, file_util::WriteFile(policy_file(),
-                                       bogus_data.c_str(),
-                                       bogus_data.size()));
+  ASSERT_EQ(size, base::WriteFile(policy_file(),
+                                  bogus_data.c_str(), bogus_data.size()));
 
   ExpectError(store_.get(), CloudPolicyStore::STATUS_LOAD_ERROR);
   store_->LoadImmediately();  // Should load without running the message loop.
@@ -226,7 +224,7 @@ TEST_F(UserCloudPolicyStoreTest, Migration) {
   ASSERT_TRUE(unsigned_builder.policy().SerializeToString(&data));
   ASSERT_TRUE(base::CreateDirectory(policy_file().DirName()));
   int size = data.size();
-  ASSERT_EQ(size, file_util::WriteFile(policy_file(), data.c_str(), size));
+  ASSERT_EQ(size, base::WriteFile(policy_file(), data.c_str(), size));
 
   // Now make sure the data can get loaded.
   Sequence s;