Add WARN_UNUSED_RESULT to base::Time methods that return bool.

content/browser/loader/upload_data_stream_builder_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/loader/upload_data_stream_builder.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <string>
@@ skipping 86 matching lines @@
 
 TEST(UploadDataStreamBuilderTest,
      WriteUploadDataStreamWithEmptyFileBackedBlob) {
   base::MessageLoopForIO message_loop;
   {
     base::FilePath test_blob_path;
     ASSERT_TRUE(base::CreateTemporaryFile(&test_blob_path));
 
     const uint64_t kZeroLength = 0;
     base::Time blob_time;
-    base::Time::FromString("Tue, 15 Nov 1994, 12:45:26 GMT", &blob_time);
+    ASSERT_TRUE(
+        base::Time::FromString("Tue, 15 Nov 1994, 12:45:26 GMT", &blob_time));
     ASSERT_TRUE(base::TouchFile(test_blob_path, blob_time, blob_time));
 
     BlobStorageContext blob_storage_context;
 
     // A blob created from an empty file added several times.
     const std::string blob_id("id-0");
     std::unique_ptr<BlobDataBuilder> blob_data_builder(
         new BlobDataBuilder(blob_id));
     blob_data_builder->AppendFile(test_blob_path, 0, kZeroLength, blob_time);
     std::unique_ptr<BlobDataHandle> handle =
@@ skipping 90 matching lines @@
     result =
         upload->Read(buffer.get(), buffer->size(), read_callback.callback());
     EXPECT_EQ(kBlobDataLength, read_callback.GetResult(result));
     EXPECT_EQ(0,
               std::memcmp(kBlobData.c_str(), buffer->data(), buffer->size()));
   }
   // Clean up for ASAN.
   base::RunLoop().RunUntilIdle();
 }
 }  // namespace content