Introducing a net::GenerateMimeMultipartBoundary helper.

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 0912d61c6ab759608758b449500892c4af4eb53b..fdff6488395f11c09dc6126cdbda90a471f4d436 100644
--- a/google_apis/drive/drive_api_requests_unittest.cc
+++ b/google_apis/drive/drive_api_requests_unittest.cc
@@ -2141,7 +2141,7 @@ TEST_F(DriveApiRequestsTest, BatchUploadRequestProgress) {
       new TestBatchableDelegate(GURL("http://example.com/test"),
                                 "application/binary", std::string(0, 'c'),
                                 base::Bind(&EmptyClosure))};
-  const size_t kExpectedUploadDataPosition[] = {208, 517, 776};
+  const size_t kExpectedUploadDataPosition[] = {205, 511, 767};
   const size_t kExpectedUploadDataSize = 851;
   request->AddRequest(requests[0]);
   request->AddRequest(requests[1]);