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

components/cronet/ios/Cronet.h

 // Copyright 2016 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.
 
 #import <Foundation/Foundation.h>
 
-#include "cronet_c_for_grpc.h"
+#include "bidirectional_stream_c.h"
 
 // A block, that takes a request, and returns YES if the request should
 // be handled.
 typedef BOOL (^RequestFilterBlock)(NSURLRequest* request);
 
 // Interface for installing Cronet.
-CRONET_EXPORT
+// TODO(gcasto): Should this macro be separate from the one defined in
+// bidirectional_stream_c.h?
+GRPC_SUPPORT_EXPORT
 @interface Cronet : NSObject
 
 // Sets whether HTTP/2 should be supported by CronetEngine. This method only has
 // any effect before |start| is called.
 + (void)setHttp2Enabled:(BOOL)http2Enabled;
 
 // Sets whether QUIC should be supported by CronetEngine. This method only has
 // any effect before |start| is called.
 + (void)setQuicEnabled:(BOOL)quicEnabled;
 
@@ skipping 57 matching lines @@
 
 // Stop net-internals logging and flush file to disk. If a logging session is
 // not in progress this call is ignored.
 + (void)stopNetLog;
 
 // Returns the full user-agent that the stack uses.
 // This is the exact string servers will see.
 + (NSString*)getUserAgent;
 
 // Get a pointer to global instance of cronet_engine for GRPC C API.
-+ (cronet_engine*)getGlobalEngine;
++ (stream_engine*)getGlobalEngine;
 
 // Returns differences in metrics collected by Cronet since the last call to
 // getGlobalMetricsDeltas, serialized as a [protobuf]
 // (https://developers.google.com/protocol-buffers).
 //
 // Cronet starts collecting these metrics after the first call to
 // getGlobalMetricsDeltras, so the first call returns no
 // useful data as no metrics have yet been collected.
 + (NSData*)getGlobalMetricsDeltas;
 
 // Sets Host Resolver Rules for testing.
 // This method only has any effect before |start| is called.
 + (void)setHostResolverRulesForTesting:(NSString*)hostResolverRulesForTesting;
 
 // Enables TestCertVerifier which accepts all certificates for testing.
 // This method only has any effect before |start| is called.
 + (void)enableTestCertVerifierForTesting;
 
 @end