Support (E)AC3 passthrough

media/base/android/BUILD.gn

Index: media/base/android/BUILD.gn
diff --git a/media/base/android/BUILD.gn b/media/base/android/BUILD.gn
index de899bee5131eff50818ba1a2de1c31c7f284e1f..352a1c58dd22feae21f31f9eaf40242b1a34cfb5 100644
--- a/media/base/android/BUILD.gn
+++ b/media/base/android/BUILD.gn
@@ -121,6 +121,7 @@ if (is_android) {
     sources = [
       "java/src/org/chromium/media/AudioManagerAndroid.java",
       "java/src/org/chromium/media/AudioRecordInput.java",
+      "java/src/org/chromium/media/AudioTrackOutputStream.java",
       "java/src/org/chromium/media/CodecProfileLevelList.java",
       "java/src/org/chromium/media/MediaCodecBridge.java",
       "java/src/org/chromium/media/MediaCodecUtil.java",
@@ -158,6 +159,7 @@ if (is_android) {
     java_files = [
       "java/src/org/chromium/media/AudioManagerAndroid.java",
       "java/src/org/chromium/media/AudioRecordInput.java",
+      "java/src/org/chromium/media/AudioTrackOutputStream.java",
       "java/src/org/chromium/media/CodecProfileLevelList.java",
       "java/src/org/chromium/media/MediaCodecBridge.java",
       "java/src/org/chromium/media/MediaCodecUtil.java",
@@ -170,4 +172,15 @@ if (is_android) {
       "java/src/org/chromium/media/MediaSwitches.java",
     ]
   }
+
+  junit_binary("media_base_junit_tests") {
+    java_files =
+        [ "java/src/test/org/chromium/media/AudioTrackOutputStreamTest.java" ]
+    deps = [
+      ":media_java",
+      "//base:base_java",
+      "//base:base_java_test_support",
+      "//third_party/junit",
+    ]
+  }
 }