Rename EncryptionMode to EncryptionScheme

The old EncryptionScheme is deprecated and replaced by EncryptionMode.
So rename EncryptionMode to EncryptionScheme.

Now Audio/VideoDecoderConfig only carries EncryptionScheme.
EncryptionPattern is passed to Renderer in DecryptConfig/DecoderBuffer.

Bug: 825041
Test: CQ, build, media_unittests
Change-Id: Iecf8720a20141939460f150d2b6abf092e621117
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1885501
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: John Rummell <jrummell@chromium.org>
Commit-Queue: Yuchen Liu <yucliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#713930}

diff --git a/media/filters/decrypting_audio_decoder_unittest.cc b/media/filters/decrypting_audio_decoder_unittest.cc
index 1932020..acb150e 100644
--- a/media/filters/decrypting_audio_decoder_unittest.cc
+++ b/media/filters/decrypting_audio_decoder_unittest.cc

@@ -108,7 +108,7 @@
 
     config_.Initialize(kCodecVorbis, kSampleFormatPlanarF32,
                        CHANNEL_LAYOUT_STEREO, kSampleRate, EmptyExtraData(),
-                       AesCtrEncryptionScheme(), base::TimeDelta(), 0);
+                       EncryptionScheme::kCenc, base::TimeDelta(), 0);
     InitializeAndExpectResult(config_, true);
   }
 
@@ -276,7 +276,7 @@
 TEST_F(DecryptingAudioDecoderTest, Initialize_InvalidAudioConfig) {
   AudioDecoderConfig config(kUnknownAudioCodec, kUnknownSampleFormat,
                             CHANNEL_LAYOUT_STEREO, 0, EmptyExtraData(),
-                            AesCtrEncryptionScheme());
+                            EncryptionScheme::kCenc);
 
   InitializeAndExpectResult(config, false);
 }
@@ -289,7 +289,7 @@
 
   AudioDecoderConfig config(kCodecVorbis, kSampleFormatPlanarF32,
                             CHANNEL_LAYOUT_STEREO, kSampleRate,
-                            EmptyExtraData(), AesCtrEncryptionScheme());
+                            EmptyExtraData(), EncryptionScheme::kCenc);
   InitializeAndExpectResult(config, false);
 }
 
@@ -297,7 +297,7 @@
   SetCdmType(CDM_WITHOUT_DECRYPTOR);
   AudioDecoderConfig config(kCodecVorbis, kSampleFormatPlanarF32,
                             CHANNEL_LAYOUT_STEREO, kSampleRate,
-                            EmptyExtraData(), AesCtrEncryptionScheme());
+                            EmptyExtraData(), EncryptionScheme::kCenc);
   InitializeAndExpectResult(config, false);
 }
 
@@ -362,7 +362,7 @@
   // channel layout and samples_per_second.
   AudioDecoderConfig new_config(kCodecVorbis, kSampleFormatPlanarS16,
                                 CHANNEL_LAYOUT_5_1, 88200, EmptyExtraData(),
-                                AesCtrEncryptionScheme());
+                                EncryptionScheme::kCenc);
   EXPECT_NE(new_config.bits_per_channel(), config_.bits_per_channel());
   EXPECT_NE(new_config.channel_layout(), config_.channel_layout());
   EXPECT_NE(new_config.samples_per_second(), config_.samples_per_second());
@@ -384,7 +384,7 @@
   // channel layout and samples_per_second.
   AudioDecoderConfig new_config(kCodecVorbis, kSampleFormatPlanarS16,
                                 CHANNEL_LAYOUT_5_1, 88200, EmptyExtraData(),
-                                Unencrypted());
+                                EncryptionScheme::kUnencrypted);
   EXPECT_NE(new_config.bits_per_channel(), config_.bits_per_channel());
   EXPECT_NE(new_config.channel_layout(), config_.channel_layout());
   EXPECT_NE(new_config.samples_per_second(), config_.samples_per_second());