Revert of Expose RTT and throughput estimates from Cronet

components/cronet/android/api/src/org/chromium/net/CronetEngine.java

Index: components/cronet/android/api/src/org/chromium/net/CronetEngine.java
diff --git a/components/cronet/android/api/src/org/chromium/net/CronetEngine.java b/components/cronet/android/api/src/org/chromium/net/CronetEngine.java
index d505e04b9b0cabd74cb51443194930f0b301b39a..e386b670818795ac45ad4087aafae7d93410e0ff 100644
--- a/components/cronet/android/api/src/org/chromium/net/CronetEngine.java
+++ b/components/cronet/android/api/src/org/chromium/net/CronetEngine.java
@@ -993,42 +993,6 @@
     public abstract int getEffectiveConnectionType();
 
     /**
-     * Returns the HTTP RTT estimate (in milliseconds) computed by the network
-     * quality estimator. Set to
-     * {@link RttThroughputValues.INVALID_RTT_THROUGHPUT} if a valid value
-     * is unavailable. This must be called after
-     * {@link #enableNetworkQualityEstimator}, and will throw an
-     * exception otherwise.
-     * @hide as it's a prototype.
-     * @return Estimate of the HTTP RTT in milliseconds.
-     */
-    public abstract int getHttpRttMs();
-
-    /**
-     * Returns the transport RTT estimate (in milliseconds) computed by the
-     * network quality estimator. Set to
-     * {@link RttThroughputValues.INVALID_RTT_THROUGHPUT} if a valid value is
-     * unavailable.  This must be called after
-     * {@link #enableNetworkQualityEstimator}, and will throw an
-     * exception otherwise.
-     * @hide as it's a prototype.
-     * @return Estimate of the transport RTT in milliseconds.
-     */
-    public abstract int getTransportRttMs();
-
-    /**
-     * Returns the downstream throughput estimate (in kilobits per second)
-     * computed by the network quality estimator. Set to
-     * {@link RttThroughputValues.INVALID_RTT_THROUGHPUT} if a valid value is
-     * unavailable.  This must be called after
-     * {@link #enableNetworkQualityEstimator}, and will
-     * throw an exception otherwise.
-     * @hide as it's a prototype.
-     * @return Estimate of the downstream throughput in kilobits per second.
-     */
-    public abstract int getDownstreamThroughputKbps();
-
-    /**
      * Configures the network quality estimator for testing. This must be called
      * before round trip time and throughput listeners are added, and after the
      * network quality estimator has been enabled.