Move ReadFileToString to the base namespace.

chrome/browser/chromeos/drive/job_scheduler_unittest.cc

Index: chrome/browser/chromeos/drive/job_scheduler_unittest.cc
diff --git a/chrome/browser/chromeos/drive/job_scheduler_unittest.cc b/chrome/browser/chromeos/drive/job_scheduler_unittest.cc
index 2b06f85c165d4046cbd09a4981e2e9aa9c1c50f4..331e75f44f53f6096a2b4be8dc53aadbda8676f4 100644
--- a/chrome/browser/chromeos/drive/job_scheduler_unittest.cc
+++ b/chrome/browser/chromeos/drive/job_scheduler_unittest.cc
@@ -658,7 +658,7 @@ TEST_F(JobSchedulerTest, DownloadFileCellularDisabled) {
   EXPECT_EQ(google_apis::HTTP_SUCCESS, download_error);
   std::string content;
   EXPECT_EQ(output_file_path, kOutputFilePath);
-  ASSERT_TRUE(file_util::ReadFileToString(output_file_path, &content));
+  ASSERT_TRUE(base::ReadFileToString(output_file_path, &content));
   EXPECT_EQ("This is some test content.", content);
 }
 
@@ -711,7 +711,7 @@ TEST_F(JobSchedulerTest, DownloadFileWimaxDisabled) {
   EXPECT_EQ(google_apis::HTTP_SUCCESS, download_error);
   std::string content;
   EXPECT_EQ(output_file_path, kOutputFilePath);
-  ASSERT_TRUE(file_util::ReadFileToString(output_file_path, &content));
+  ASSERT_TRUE(base::ReadFileToString(output_file_path, &content));
   EXPECT_EQ("This is some test content.", content);
 }
 
@@ -756,7 +756,7 @@ TEST_F(JobSchedulerTest, DownloadFileCellularEnabled) {
   EXPECT_EQ(google_apis::HTTP_SUCCESS, download_error);
   std::string content;
   EXPECT_EQ(output_file_path, kOutputFilePath);
-  ASSERT_TRUE(file_util::ReadFileToString(output_file_path, &content));
+  ASSERT_TRUE(base::ReadFileToString(output_file_path, &content));
   EXPECT_EQ("This is some test content.", content);
 }
 
@@ -801,7 +801,7 @@ TEST_F(JobSchedulerTest, DownloadFileWimaxEnabled) {
   EXPECT_EQ(google_apis::HTTP_SUCCESS, download_error);
   std::string content;
   EXPECT_EQ(output_file_path, kOutputFilePath);
-  ASSERT_TRUE(file_util::ReadFileToString(output_file_path, &content));
+  ASSERT_TRUE(base::ReadFileToString(output_file_path, &content));
   EXPECT_EQ("This is some test content.", content);
 }