Delete another class from the demo app.

Merge the two MediaDrmCallback classes, since they're pretty
much identical.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=123220343

demo/src/main/java/com/google/android/exoplayer/demo/PlayerActivity.java

@@ -335,10 +335,10 @@ public class PlayerActivity extends Activity implements SurfaceHolder.Callback,
     }
     if (C.PLAYREADY_UUID.equals(uuid)) {
       return StreamingDrmSessionManager.newPlayReadyInstance(
-          new SmoothStreamingTestMediaDrmCallback(), null, mainHandler, eventLogger);
+          TestMediaDrmCallback.newPlayReadyInstance(), null, mainHandler, eventLogger);
     } else if (C.WIDEVINE_UUID.equals(uuid)) {
       return StreamingDrmSessionManager.newWidevineInstance(
-          new WidevineTestMediaDrmCallback(id, provider), null, mainHandler, eventLogger);
+          TestMediaDrmCallback.newWidevineInstance(id, provider), null, mainHandler, eventLogger);
     } else {
       throw new UnsupportedDrmException(UnsupportedDrmException.REASON_UNSUPPORTED_SCHEME);
     }

demo/src/main/java/com/google/android/exoplayer/demo/TestMediaDrmCallback.java

@@ -16,7 +16,6 @@
 package com.google.android.exoplayer.demo;
 
 import com.google.android.exoplayer.drm.MediaDrmCallback;
-import com.google.android.exoplayer.drm.StreamingDrmSessionManager;
 import com.google.android.exoplayer.util.Util;
 
 import android.annotation.TargetApi;
@@ -30,20 +29,38 @@ import java.util.Map;
 import java.util.UUID;
 
 /**
- * Demo {@link StreamingDrmSessionManager} for smooth streaming test content.
+ * A {@link MediaDrmCallback} for test content.
  */
 @TargetApi(18)
-public final class SmoothStreamingTestMediaDrmCallback implements MediaDrmCallback {
+/* package */ final class TestMediaDrmCallback implements MediaDrmCallback {
 
-  private static final String PLAYREADY_TEST_DEFAULT_URI =
+  private static final String WIDEVINE_BASE_URL = "https://proxy.uat.widevine.com/proxy";
+  private static final String PLAYREADY_BASE_URL =
       "http://playready.directtaps.net/pr/svc/rightsmanager.asmx";
-  private static final Map<String, String> KEY_REQUEST_PROPERTIES;
+  private static final Map<String, String> PLAYREADY_KEY_REQUEST_PROPERTIES;
   static {
     HashMap<String, String> keyRequestProperties = new HashMap<>();
     keyRequestProperties.put("Content-Type", "text/xml");
     keyRequestProperties.put("SOAPAction",
         "http://schemas.microsoft.com/DRM/2007/03/protocols/AcquireLicense");
-    KEY_REQUEST_PROPERTIES = keyRequestProperties;
+    PLAYREADY_KEY_REQUEST_PROPERTIES = keyRequestProperties;
+  }
+
+  private final String defaultUrl;
+  private final Map<String, String> keyRequestProperties;
+
+  public static TestMediaDrmCallback newWidevineInstance(String contentId, String provider) {
+    String defaultUrl = WIDEVINE_BASE_URL + "?video_id=" + contentId + "&provider=" + provider;
+    return new TestMediaDrmCallback(defaultUrl, null);
+  }
+
+  public static TestMediaDrmCallback newPlayReadyInstance() {
+    return new TestMediaDrmCallback(PLAYREADY_BASE_URL, PLAYREADY_KEY_REQUEST_PROPERTIES);
+  }
+
+  private TestMediaDrmCallback(String defaultUrl, Map<String, String> keyRequestProperties) {
+    this.defaultUrl = defaultUrl;
+    this.keyRequestProperties = keyRequestProperties;
   }
 
   @Override
@@ -56,9 +73,9 @@ public final class SmoothStreamingTestMediaDrmCallback implements MediaDrmCallba
   public byte[] executeKeyRequest(UUID uuid, KeyRequest request) throws Exception {
     String url = request.getDefaultUrl();
     if (TextUtils.isEmpty(url)) {
-      url = PLAYREADY_TEST_DEFAULT_URI;
+      url = defaultUrl;
     }
-    return Util.executePost(url, request.getData(), KEY_REQUEST_PROPERTIES);
+    return Util.executePost(url, request.getData(), keyRequestProperties);
   }
 
 }

demo/src/main/java/com/google/android/exoplayer/demo/TrackSelectionHelper.java

@@ -41,7 +41,8 @@ import java.util.Locale;
 /**
  * Helper class for displaying track selection dialogs.
  */
-public class TrackSelectionHelper implements View.OnClickListener, DialogInterface.OnClickListener {
+/* package */ final class TrackSelectionHelper implements View.OnClickListener,
+    DialogInterface.OnClickListener {
 
   private final DefaultTrackSelector selector;
 

demo/src/main/java/com/google/android/exoplayer/demo/WidevineTestMediaDrmCallback.java

@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.google.android.exoplayer.demo;
-
-import com.google.android.exoplayer.drm.MediaDrmCallback;
-import com.google.android.exoplayer.util.Util;
-
-import android.annotation.TargetApi;
-import android.media.MediaDrm.KeyRequest;
-import android.media.MediaDrm.ProvisionRequest;
-import android.text.TextUtils;
-
-import java.io.IOException;
-import java.util.UUID;
-
-/**
- * A {@link MediaDrmCallback} for Widevine test content.
- */
-@TargetApi(18)
-public final class WidevineTestMediaDrmCallback implements MediaDrmCallback {
-
-  private static final String WIDEVINE_GTS_DEFAULT_BASE_URI =
-      "https://proxy.uat.widevine.com/proxy";
-
-  private final String defaultUri;
-
-  public WidevineTestMediaDrmCallback(String contentId, String provider) {
-    String params = "?video_id=" + contentId + "&provider=" + provider;
-    defaultUri = WIDEVINE_GTS_DEFAULT_BASE_URI + params;
-  }
-
-  @Override
-  public byte[] executeProvisionRequest(UUID uuid, ProvisionRequest request) throws IOException {
-    String url = request.getDefaultUrl() + "&signedRequest=" + new String(request.getData());
-    return Util.executePost(url, null, null);
-  }
-
-  @Override
-  public byte[] executeKeyRequest(UUID uuid, KeyRequest request) throws IOException {
-    String url = request.getDefaultUrl();
-    if (TextUtils.isEmpty(url)) {
-      url = defaultUri;
-    }
-    return Util.executePost(url, request.getData(), null);
-  }
-
-}