[Cronet] Add isDone() check in CronetBidirectionalStream#onWritevCompleted

components/cronet/android/java/src/org/chromium/net/impl/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.impl;
 
 import org.chromium.base.Log;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
@@ skipping 528 matching lines @@
         postTaskToExecutor(mOnReadCompletedTask);
     }
 
     @SuppressWarnings("unused")
     @CalledByNative
     private void onWritevCompleted(final ByteBuffer[] byteBuffers, int[] initialPositions,
             int[] initialLimits, boolean endOfStream) {
         assert byteBuffers.length == initialPositions.length;
         assert byteBuffers.length == initialLimits.length;
         synchronized (mNativeStreamLock) {
+            if (isDoneLocked()) return;
             mWriteState = State.WAITING_FOR_FLUSH;
             // Flush if there is anything in the flush queue mFlushData.
             if (!mFlushData.isEmpty()) {
                 sendFlushDataLocked();
             }
         }
         for (int i = 0; i < byteBuffers.length; i++) {
             ByteBuffer buffer = byteBuffers[i];
             if (buffer.position() != initialPositions[i] || buffer.limit() != initialLimits[i]) {
                 failWithException(new CronetExceptionImpl(
@@ skipping 244 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);
 }