Added Network Quality Estimator Real-time interface to Cronet

components/cronet/android/java/src/org/chromium/net/UrlRequestContext.java

Index: components/cronet/android/java/src/org/chromium/net/UrlRequestContext.java
diff --git a/components/cronet/android/java/src/org/chromium/net/UrlRequestContext.java b/components/cronet/android/java/src/org/chromium/net/UrlRequestContext.java
index 3ed4106847cd8b989a84a32d38267655d98f8c2b..b4332c1694d20c59a02446cce66f015393c0ce91 100644
--- a/components/cronet/android/java/src/org/chromium/net/UrlRequestContext.java
+++ b/components/cronet/android/java/src/org/chromium/net/UrlRequestContext.java
@@ -94,6 +94,53 @@ public abstract class UrlRequestContext {
     public abstract void stopNetLog();
 
     /**
+     * Enables the network quality estimator. This must be called before round
+     * trip time and throughput observers are added.
+     * @param executor An executor on which all observers will be called.
+     */
+    public abstract void enableNetworkQualityEstimator(Executor executor);
+
+    /**
+     * Enables the network quality estimator for testing. This must be called
+     * before round trip time and throughput observers are added. Set both
+     * boolean parameters to false for default behavior.
+     * @param useLocalHostRequests Include requests to localhost in estimates.
+     * @param useSmallerResponses Include small responses in throughput estimates.
+     * @param executor An executor on which all observers will be called.
+     */
+    abstract void enableNetworkQualityEstimator(
+            boolean useLocalHostRequests, boolean useSmallerResponses, Executor executor);
+
+    /**
+     * Adds an observer of round trip time observations. This must be called
+     * after {@link #enableNetworkQualityEstimator}.
+     * @param observer The observer of round trip times.
+     */
+    public abstract void addRttObserver(NetworkQualityRttObserver observer);
+
+    /**
+     * Removes an observer of round trip times if on the observer list. This
+     * should be called after an RttObserver is added in order to stop
+     * receiving observations.
+     * @param observer The observer of round trip times.
+     */
+    public abstract void removeRttObserver(NetworkQualityRttObserver observer);
+
+    /**
+     * Adds an observer of throughout. This must be called after
+     * {@link #enableNetworkQualityEstimator}.
+     * @param observer The observer of throughput.
+     */
+    public abstract void addThroughputObserver(NetworkQualityThroughputObserver observer);
+
+    /**
+     * Removes an observer of throughput. This should be called after a
+     * ThroughputObserver is added in order to stop receiving observations.
+     * @param observer The observer of throughput.
+     */
+    public abstract void removeThroughputObserver(NetworkQualityThroughputObserver observer);
+
+    /**
      * Creates a {@link UrlRequestContext} with the given
      * {@link UrlRequestContextConfig}.
      * @param context Android {@link Context}.