Use MediaMetadataRetriever.setDataSource(Context, Uri) for "content" scheme.

content/public/android/java/src/org/chromium/content/browser/MediaResourceGetter.java

Index: content/public/android/java/src/org/chromium/content/browser/MediaResourceGetter.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/MediaResourceGetter.java b/content/public/android/java/src/org/chromium/content/browser/MediaResourceGetter.java
index f7b7cd3a4503f34883bff2209fd0bde8ba8d4f9c..8a79d4d03e0d1c6c5245a75758b996a4a837b58f 100644
--- a/content/public/android/java/src/org/chromium/content/browser/MediaResourceGetter.java
+++ b/content/public/android/java/src/org/chromium/content/browser/MediaResourceGetter.java
@@ -10,6 +10,7 @@ import android.content.pm.PackageManager;
 import android.media.MediaMetadataRetriever;
 import android.net.ConnectivityManager;
 import android.net.NetworkInfo;
+import android.net.Uri;
 import android.os.ParcelFileDescriptor;
 import android.text.TextUtils;
 
@@ -228,6 +229,15 @@ class MediaResourceGetter {
                 return false;
             }
         }
+        if (scheme.equals("content")) {
+            try {
+                configure(context, Uri.parse(uri.toString()));
+                return true;
+            } catch (RuntimeException e) {
+                Log.e(TAG, "Error configuring data source: %s", e.getMessage());

[qinmin, 2016/01/25 18:58:56]

nit: you can simply do Log.e(TAG, "Error configuring data source: %s", e);

[horo, 2016/01/25 22:58:41]

Done.

+                return false;
+            }
+        }
         if (uri.getPath() != null && uri.getPath().endsWith(".m3u8")) {
             // MediaMetadataRetriever does not work with HLS correctly.
             return false;
@@ -397,6 +407,10 @@ class MediaResourceGetter {
         mRetriever.setDataSource(path);
     }
 
+    void configure(Context context, Uri uri) {
+        mRetriever.setDataSource(context, uri);
+    }
+
     @VisibleForTesting
     String extractMetadata(int key) {
         return mRetriever.extractMetadata(key);