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

components/grpc_support/cronet_c_for_grpc.cc

Index: components/grpc_support/cronet_c_for_grpc.cc
diff --git a/components/cronet/ios/cronet_c_for_grpc.cc b/components/grpc_support/cronet_c_for_grpc.cc
similarity index 91%
rename from components/cronet/ios/cronet_c_for_grpc.cc
rename to components/grpc_support/cronet_c_for_grpc.cc
index 5c7810a9fcd554ec57daf615111a17c0041b87e0..e95b65526e462c3e6422eb05ca55262b9cad1eeb 100644
--- a/components/cronet/ios/cronet_c_for_grpc.cc
+++ b/components/grpc_support/cronet_c_for_grpc.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "components/cronet/ios/cronet_c_for_grpc.h"
+#include "components/grpc_support/cronet_c_for_grpc.h"
 
 #include <stdbool.h>
 
@@ -17,8 +17,8 @@
 #include "base/memory/ref_counted.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
-#include "components/cronet/ios/cronet_bidirectional_stream.h"
-#include "components/cronet/ios/cronet_environment.h"
+#include "components/grpc_support/cronet_bidirectional_stream.h"
+#include "components/grpc_support/environment.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/base/request_priority.h"
@@ -69,7 +69,7 @@ HeadersArray::~HeadersArray() {
 }
 
 class CronetBidirectionalStreamAdapter
-    : public cronet::CronetBidirectionalStream::Delegate {
+    : public grpc_support::CronetBidirectionalStream::Delegate {
  public:
   CronetBidirectionalStreamAdapter(
       cronet_engine* engine,
@@ -95,7 +95,7 @@ class CronetBidirectionalStreamAdapter
 
   void OnCanceled() override;
 
-  static cronet::CronetBidirectionalStream* GetCronetStream(
+  static grpc_support::CronetBidirectionalStream* GetCronetStream(
       cronet_bidirectional_stream* stream);
 
   static void DestroyAdapterForStream(cronet_bidirectional_stream* stream);
@@ -104,8 +104,8 @@ class CronetBidirectionalStreamAdapter
   void DestroyOnNetworkThread();
 
   // None of these objects are owned by |this|.
-  cronet::CronetEnvironment* cronet_environment_;
-  cronet::CronetBidirectionalStream* cronet_bidirectional_stream_;
+  grpc_support::Environment* environment_;
+  grpc_support::CronetBidirectionalStream* cronet_bidirectional_stream_;
   // C side
   cronet_bidirectional_stream* stream_;
   cronet_bidirectional_stream_callback* callback_;
@@ -115,13 +115,13 @@ CronetBidirectionalStreamAdapter::CronetBidirectionalStreamAdapter(
     cronet_engine* engine,
     cronet_bidirectional_stream* stream,
     cronet_bidirectional_stream_callback* callback)
-    : cronet_environment_(
-          reinterpret_cast<cronet::CronetEnvironment*>(engine->obj)),
+    : environment_(
+          reinterpret_cast<grpc_support::Environment*>(engine->obj)),
       stream_(stream),
       callback_(callback) {
-  DCHECK(cronet_environment_);
+  DCHECK(environment_);
   cronet_bidirectional_stream_ =
-      new cronet::CronetBidirectionalStream(cronet_environment_, this);
+      new grpc_support::CronetBidirectionalStream(environment_, this);
 }
 
 CronetBidirectionalStreamAdapter::~CronetBidirectionalStreamAdapter() {}
@@ -172,7 +172,7 @@ void CronetBidirectionalStreamAdapter::OnCanceled() {
   callback_->on_canceled(stream_);
 }
 
-cronet::CronetBidirectionalStream*
+grpc_support::CronetBidirectionalStream*
 CronetBidirectionalStreamAdapter::GetCronetStream(
     cronet_bidirectional_stream* stream) {
   DCHECK(stream);
@@ -193,14 +193,14 @@ void CronetBidirectionalStreamAdapter::DestroyAdapterForStream(
   // posting task to executor throws an exception), but is posted, so |this|
   // is valid until calling task is complete.
   adapter->cronet_bidirectional_stream_->Destroy();
-  adapter->cronet_environment_->PostToNetworkThread(
+  adapter->environment_->PostToNetworkThread(
       FROM_HERE,
       base::Bind(&CronetBidirectionalStreamAdapter::DestroyOnNetworkThread,
                  base::Unretained(adapter)));
 }
 
 void CronetBidirectionalStreamAdapter::DestroyOnNetworkThread() {
-  DCHECK(cronet_environment_->IsOnNetworkThread());
+  DCHECK(environment_->IsOnNetworkThread());
   delete this;
 }
 
@@ -245,7 +245,7 @@ int cronet_bidirectional_stream_start(
     const char* method,
     const cronet_bidirectional_stream_header_array* headers,
     bool end_of_stream) {
-  cronet::CronetBidirectionalStream* cronet_stream =
+  grpc_support::CronetBidirectionalStream* cronet_stream =
       CronetBidirectionalStreamAdapter::GetCronetStream(stream);
   net::HttpRequestHeaders request_headers;
   if (headers) {