Remove destruction-only TearDown() methods in Drive related test.

chrome/browser/chromeos/drive/drive_url_request_job_unittest.cc

Index: chrome/browser/chromeos/drive/drive_url_request_job_unittest.cc
diff --git a/chrome/browser/chromeos/drive/drive_url_request_job_unittest.cc b/chrome/browser/chromeos/drive/drive_url_request_job_unittest.cc
index 664af01100c01c2dc41b44de0135edbfba9da392..95dd8dceba3e40b20e81018df6372e44ea391dca 100644
--- a/chrome/browser/chromeos/drive/drive_url_request_job_unittest.cc
+++ b/chrome/browser/chromeos/drive/drive_url_request_job_unittest.cc
@@ -129,16 +129,6 @@ class DriveURLRequestJobTest : public testing::Test {
     test_delegate_.reset(new TestDelegate);
   }
 
-  virtual void TearDown() OVERRIDE {
-    test_delegate_.reset();
-    url_request_context_.reset();
-    test_url_request_job_factory_.reset();
-    test_network_delegate_.reset();
-
-    fake_file_system_.reset();
-    fake_drive_service_.reset();
-  }
-
   FileSystemInterface* GetFileSystem() {
     return fake_file_system_.get();
   }