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

components/cronet/ios/BUILD.gn

Index: components/cronet/ios/BUILD.gn
diff --git a/components/cronet/ios/BUILD.gn b/components/cronet/ios/BUILD.gn
index ca48d5bab724ab30266adedefbeadfeb14aed20a..9f74f968e0a3f860b77baa792fd5c4ff70150e7e 100644
--- a/components/cronet/ios/BUILD.gn
+++ b/components/cronet/ios/BUILD.gn
@@ -30,6 +30,7 @@ source_set("cronet_sources") {
   deps = [
     ":cronet_version_header",
     "//base:base",
+    "//components/grpc_support",
     "//components/metrics:metrics",
     "//components/metrics/proto:proto",
     "//components/prefs:prefs",
@@ -44,10 +45,6 @@ source_set("cronet_sources") {
     "../stale_host_resolver.h",
     "../url_request_context_config.cc",
     "../url_request_context_config.h",
-    "cronet_bidirectional_stream.cc",
-    "cronet_bidirectional_stream.h",
-    "cronet_c_for_grpc.cc",
-    "cronet_c_for_grpc.h",
     "cronet_environment.cc",
     "cronet_environment.h",
   ]
@@ -75,14 +72,21 @@ ios_framework_bundle("cronet_framework") {
 
   libs = [ "UIKit.Framework" ]
 
+  public_deps = [
+    "//components/grpc_support",
+  ]
+
   public_headers = [
     "Cronet.h",
-    "cronet_c_for_grpc.h",
+
+    # TODO(gcasto): Figure out some better way of doing this.
+    "../../grpc_support/cronet_c_for_grpc.h",
   ]
 
   sources = [
     "Cronet.h",
     "Cronet.mm",
+    "../../grpc_support/cronet_c_for_graph.h",
   ]
 
   configs -= [ "//build/config/compiler:default_symbols" ]