Moving gRPC support interfaces out of cronet and into a new component.

components/grpc_support/cronet_bidirectional_stream.h

Index: components/grpc_support/cronet_bidirectional_stream.h
diff --git a/components/cronet/ios/cronet_bidirectional_stream.h b/components/grpc_support/cronet_bidirectional_stream.h
similarity index 97%
rename from components/cronet/ios/cronet_bidirectional_stream.h
rename to components/grpc_support/cronet_bidirectional_stream.h
index 6d82b2327f62265ce08a9116b0534296a0b0d289..09c4e6c712050c6a09e39ea305b709fe6221eba0 100644
--- a/components/cronet/ios/cronet_bidirectional_stream.h
+++ b/components/grpc_support/cronet_bidirectional_stream.h
@@ -18,9 +18,9 @@ class HttpRequestHeaders;
 class WrappedIOBuffer;
 }  // namespace net
 
-namespace cronet {
+namespace grpc_support {
 
-class CronetEnvironment;
+class Environment;
 
 // An adapter to net::BidirectionalStream.
 // Created and configured from any thread. Start, ReadData, WriteData and
@@ -52,7 +52,7 @@ class CronetBidirectionalStream : public net::BidirectionalStream::Delegate {
     virtual void OnCanceled() = 0;
   };
 
-  CronetBidirectionalStream(CronetEnvironment* environment, Delegate* delegate);
+  CronetBidirectionalStream(Environment* environment, Delegate* delegate);

[mef, 2016/08/26 20:17:35]

I think we should change CronetBidirectionalStream to use
UrlRequestContextGetter instead of [Cronet]Environment.

   ~CronetBidirectionalStream() override;
 
   // Disables automatic flushing of each buffer passed to WriteData().
@@ -206,7 +206,7 @@ class CronetBidirectionalStream : public net::BidirectionalStream::Delegate {
   bool disable_auto_flush_;
   bool delay_headers_until_flush_;
 
-  CronetEnvironment* const environment_;
+  Environment* const environment_;
 
   scoped_refptr<net::WrappedIOBuffer> read_buffer_;
 
@@ -223,6 +223,6 @@ class CronetBidirectionalStream : public net::BidirectionalStream::Delegate {
   DISALLOW_COPY_AND_ASSIGN(CronetBidirectionalStream);
 };
 
-}  // namespace cronet
+}  // namespace grpc_support
 
 #endif  // COMPONENTS_CRONET_IOS_CRONET_BIDIRECTIONAL_STREAM_H_