Presentation API: reject screen availability observing on Android low ram devices.

chrome/android/java/src/org/chromium/chrome/browser/media/router/cast/CastMediaRouteProvider.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.media.router.cast;
 
 import android.content.Context;
 import android.support.v7.media.MediaRouter;
 
 import org.chromium.chrome.browser.media.router.DiscoveryDelegate;
@@ skipping 183 matching lines @@
     }
 
     @Nullable
     private static MediaRouter getAndroidMediaRouter(Context applicationContext) {
         try {
             // Pre-MR1 versions of JB do not have the complete MediaRouter APIs,
             // so getting the MediaRouter instance will throw an exception.
             return MediaRouter.getInstance(applicationContext);
         } catch (NoSuchMethodError e) {
             return null;
+        } catch (NoClassDefFoundError e) {
+            // Happens with Robolectric.

[mark a. foltz, 2015/10/01 18:33:28]

This comment didn't make sense to me, maybe it does to Android developers :)

+            return null;
         }
     }
 
 }