[Cronet] Make delaying sending request headers explicit in bidirectional stream

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

Index: components/cronet/android/java/src/org/chromium/net/CronetUrlRequestContext.java
diff --git a/components/cronet/android/java/src/org/chromium/net/CronetUrlRequestContext.java b/components/cronet/android/java/src/org/chromium/net/CronetUrlRequestContext.java
index 1c4140cbcdbc4e266121b385596e21bd8f7c73c1..d0dc5862ed0713c4adcfd5abbd22c4bf70511463 100644
--- a/components/cronet/android/java/src/org/chromium/net/CronetUrlRequestContext.java
+++ b/components/cronet/android/java/src/org/chromium/net/CronetUrlRequestContext.java
@@ -149,11 +149,12 @@ class CronetUrlRequestContext extends CronetEngine {
     @Override
     BidirectionalStream createBidirectionalStream(String url, BidirectionalStream.Callback callback,
             Executor executor, String httpMethod, List<Map.Entry<String, String>> requestHeaders,
-            @BidirectionalStream.Builder.StreamPriority int priority, boolean disableAutoFlush) {
+            @BidirectionalStream.Builder.StreamPriority int priority, boolean disableAutoFlush,
+            boolean delayHeadersUntilNextWrite) {

[mef, 2016/06/01 21:33:21]

nit: maybe delayHeadersUntilFirstFlush? In any case, name must be consistent
with CronetEngine.

[xunjieli, 2016/06/01 22:27:16]

Done.

         synchronized (mLock) {
             checkHaveAdapter();
             return new CronetBidirectionalStream(this, url, priority, callback, executor,
-                    httpMethod, requestHeaders, disableAutoFlush);
+                    httpMethod, requestHeaders, disableAutoFlush, delayHeadersUntilNextWrite);
         }
     }