Reland of Split iOS sdk in to separate targets

webrtc/sdk/objc/Framework/Classes/RTCPeerConnection+Stats.mm

-/*
- *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#import "RTCPeerConnection+Private.h"
-
-#import "NSString+StdString.h"
-#import "RTCMediaStreamTrack+Private.h"
-#import "RTCLegacyStatsReport+Private.h"
-
-#include "webrtc/base/checks.h"
-
-namespace webrtc {
-
-class StatsObserverAdapter : public StatsObserver {
- public:
-  StatsObserverAdapter(void (^completionHandler)
-      (NSArray<RTCLegacyStatsReport *> *stats)) {
-    completion_handler_ = completionHandler;
-  }
-
-  ~StatsObserverAdapter() {
-    completion_handler_ = nil;
-  }
-
-  void OnComplete(const StatsReports& reports) override {
-    RTC_DCHECK(completion_handler_);
-    NSMutableArray *stats = [NSMutableArray arrayWithCapacity:reports.size()];
-    for (const auto* report : reports) {
-      RTCLegacyStatsReport *statsReport =
-          [[RTCLegacyStatsReport alloc] initWithNativeReport:*report];
-      [stats addObject:statsReport];
-    }
-    completion_handler_(stats);
-    completion_handler_ = nil;
-  }
-
- private:
-  void (^completion_handler_)(NSArray<RTCLegacyStatsReport *> *stats);
-};
-}  // namespace webrtc
-
-@implementation RTCPeerConnection (Stats)
-
-- (void)statsForTrack:(RTCMediaStreamTrack *)mediaStreamTrack
-     statsOutputLevel:(RTCStatsOutputLevel)statsOutputLevel
-    completionHandler:
-    (void (^)(NSArray<RTCLegacyStatsReport *> *stats))completionHandler {
-  rtc::scoped_refptr<webrtc::StatsObserverAdapter> observer(
-      new rtc::RefCountedObject<webrtc::StatsObserverAdapter>
-          (completionHandler));
-  webrtc::PeerConnectionInterface::StatsOutputLevel nativeOutputLevel =
-      [[self class] nativeStatsOutputLevelForLevel:statsOutputLevel];
-  self.nativePeerConnection->GetStats(
-      observer, mediaStreamTrack.nativeTrack, nativeOutputLevel);
-}
-
-@end