Add SubsampleEntry constructor.

media/base/decoder_buffer_unittest.cc

Index: media/base/decoder_buffer_unittest.cc
diff --git a/media/base/decoder_buffer_unittest.cc b/media/base/decoder_buffer_unittest.cc
index 20cc1fb3b3212c3f02ec18862bf093bcf5ae2a37..ac22910fc94e773de95985e396dca45d6e24580d 100644
--- a/media/base/decoder_buffer_unittest.cc
+++ b/media/base/decoder_buffer_unittest.cc
@@ -99,9 +99,23 @@ TEST(DecoderBufferTest, ReadingWriting) {
   EXPECT_FALSE(buffer->end_of_stream());
 }
 
-TEST(DecoderBufferTest, GetDecryptConfig) {
+TEST(DecoderBufferTest, DecryptConfig) {
   scoped_refptr<DecoderBuffer> buffer(new DecoderBuffer(0));
   EXPECT_FALSE(buffer->decrypt_config());
+
+  const char kKeyId[] = "key id";
+  const char kIv[] = "0123456789abcdef";
+  std::vector<SubsampleEntry> subsamples;
+  subsamples.push_back(SubsampleEntry(10, 20));
+  subsamples.push_back(SubsampleEntry(30, 40));

[ddorwin, 2014/11/25 20:47:48]

nit: This example could imply some relation between the two when in reality, 40
would more likely be 20. It might be clearer to have something like:
10, 5
15, 5

[xhwang, 2014/11/25 22:13:44]

Done.

+
+  DecryptConfig decrypt_config(kKeyId, kIv, subsamples);
+
+  buffer->set_decrypt_config(
+      make_scoped_ptr(new DecryptConfig(kKeyId, kIv, subsamples)));
+
+  EXPECT_TRUE(buffer->decrypt_config());
+  EXPECT_TRUE(buffer->decrypt_config()->Matches(decrypt_config));
 }
 
 TEST(DecoderBufferTest, IsKeyFrame) {