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

components/cronet/ios/Cronet.mm

 // 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 "components/cronet/ios/Cronet.h"
 
 #include <memory>
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 93 matching lines @@
 
 + (NSString*)getUserAgent {
   if (!gChromeNet.Get().get()) {
     return nil;
   }
 
   return [NSString stringWithCString:gChromeNet.Get()->user_agent().c_str()
                             encoding:[NSString defaultCStringEncoding]];
 }
 
-+ (cronet_engine*)getGlobalEngine {
++ (stream_engine*)getGlobalEngine {
   DCHECK(gChromeNet.Get().get());
   if (gChromeNet.Get().get()) {
-    static cronet_engine engine;
-    engine.obj = gChromeNet.Get().get();
+    static stream_engine engine;
+    engine.obj = gChromeNet.Get()->GetURLRequestContextGetter();
     return &engine;
   }
   return nil;
 }
 
 // This is a non-public dummy method that prevents the linker from stripping out
-// the otherwise non-referenced methods from 'cronet_bidirectional_stream.cc'.
+// the otherwise non-referenced methods from 'bidirectional_stream.cc'.
 + (void)preventStrippingCronetBidirectionalStream {
-  cronet_bidirectional_stream_create(NULL, 0, 0);
+  bidirectional_stream_create(NULL, 0, 0);
 }
 
 @end