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

components/cronet/ios/cronet_environment.cc

 // 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.
 
 #include "components/cronet/ios/cronet_environment.h"
 
 #include <utility>
 
 #include "base/at_exit.h"
 #include "base/atomicops.h"
@@ skipping 78 matching lines @@
 
   cronet::CronetEnvironment* environment_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   DISALLOW_COPY_AND_ASSIGN(CronetURLRequestContextGetter);
 };
 
 }  // namespace
 
 namespace cronet {
 
-bool CronetEnvironment::IsOnNetworkThread() {
-  return network_io_thread_->task_runner()->BelongsToCurrentThread();
-}
-
 void CronetEnvironment::PostToNetworkThread(
     const tracked_objects::Location& from_here,
     const base::Closure& task) {
   network_io_thread_->task_runner()->PostTask(from_here, task);
 }
 
 void CronetEnvironment::PostToFileUserBlockingThread(
     const tracked_objects::Location& from_here,
     const base::Closure& task) {
   file_user_blocking_thread_->task_runner()->PostTask(from_here, task);
@@ skipping 281 matching lines @@
 
 std::vector<uint8_t> CronetEnvironment::GetHistogramDeltas() {
   base::StatisticsRecorder::Initialize();
   std::vector<uint8_t> data;
   if (!HistogramManager::GetInstance()->GetDeltas(&data))
     return std::vector<uint8_t>();
   return data;
 }
 
 }  // namespace cronet