[Cronet] Remove unused ping and windowUpdate methods

components/cronet/android/java/src/org/chromium/net/CronetBidirectionalStream.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.net;
 
 import org.chromium.base.Log;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
@@ skipping 385 matching lines @@
         synchronized (mNativeStreamLock) {
             List<ByteBuffer> flushData = new LinkedList<ByteBuffer>();
             for (ByteBuffer buffer : mFlushData) {
                 flushData.add(buffer.asReadOnlyBuffer());
             }
             return flushData;
         }
     }
 
     @Override
-    public void ping(PingCallback callback, Executor executor) {
-        // TODO(mef): May be last thing to be implemented on Android.
-        throw new UnsupportedOperationException("ping is not supported yet.");
-    }
-
-    @Override
-    public void windowUpdate(int windowSizeIncrement) {
-        // TODO(mef): Understand the needs and semantics of this method.
-        throw new UnsupportedOperationException("windowUpdate is not supported yet.");
-    }
-
-    @Override
     public void cancel() {
         synchronized (mNativeStreamLock) {
             if (isDoneLocked() || mReadState == State.NOT_STARTED) {
                 return;
             }
             mReadState = mWriteState = State.CANCELED;
             destroyNativeStreamLocked(true);
         }
     }
 
@@ skipping 337 matching lines @@
     private native boolean nativeReadData(
             long nativePtr, ByteBuffer byteBuffer, int position, int limit);
 
     @NativeClassQualifiedName("CronetBidirectionalStreamAdapter")
     private native boolean nativeWritevData(long nativePtr, ByteBuffer[] buffers, int[] positions,
             int[] limits, boolean endOfStream);
 
     @NativeClassQualifiedName("CronetBidirectionalStreamAdapter")
     private native void nativeDestroy(long nativePtr, boolean sendOnCanceled);
 }