Revert of Revert of Drive: Let DriveUploader use batch request API.

google_apis/drive/drive_api_requests_unittest.cc

Index: google_apis/drive/drive_api_requests_unittest.cc
diff --git a/google_apis/drive/drive_api_requests_unittest.cc b/google_apis/drive/drive_api_requests_unittest.cc
index d83292e988f9cdfd1ccc4de9ecf46857b78598ed..9d69513615d9589b2c6d3f07a73bba1a878c2a76 100644
--- a/google_apis/drive/drive_api_requests_unittest.cc
+++ b/google_apis/drive/drive_api_requests_unittest.cc
@@ -2015,9 +2015,12 @@
 }
 
 TEST_F(DriveApiRequestsTest, EmptyBatchUploadRequest) {
-  scoped_ptr<drive::BatchUploadRequest> request(new drive::BatchUploadRequest(
-      request_sender_.get(), *url_generator_));
-  EXPECT_DEATH(request->Commit(), "");
+  drive::BatchUploadRequest* const request =
+      new drive::BatchUploadRequest(request_sender_.get(), *url_generator_);
+  base::WeakPtr<drive::BatchUploadRequest> weak_ptr =
+      request->GetWeakPtrAsBatchUploadRequest();
+  request->Commit();
+  ASSERT_FALSE(weak_ptr.get());
 }
 
 TEST(ParseMultipartResponseTest, Empty) {