Rewrite scoped_ptr<T>(NULL) to use the default ctor in chrome/.

chrome/browser/chromeos/drive/drive_integration_service_unittest.cc

Index: chrome/browser/chromeos/drive/drive_integration_service_unittest.cc
diff --git a/chrome/browser/chromeos/drive/drive_integration_service_unittest.cc b/chrome/browser/chromeos/drive/drive_integration_service_unittest.cc
index 826f09f039666cc300dd9be11cfb739d12ffe202..5d5339bd1456428b34ab95cdbe1558157ed9c4cf 100644
--- a/chrome/browser/chromeos/drive/drive_integration_service_unittest.cc
+++ b/chrome/browser/chromeos/drive/drive_integration_service_unittest.cc
@@ -16,9 +16,8 @@ namespace drive {
 
 class DriveIntegrationServiceTest : public testing::Test {
  public:
-  DriveIntegrationServiceTest() :
-      ui_thread_(content::BrowserThread::UI, &message_loop_),
-      integration_service_(NULL) {}
+  DriveIntegrationServiceTest()
+      : ui_thread_(content::BrowserThread::UI, &message_loop_) {}
 
   virtual void SetUp() OVERRIDE {
     profile_.reset(new TestingProfile);