Build dynamic iOS SDK.

webrtc/base/objc/RTCFieldTrials.mm

-/*
- *  Copyright 2016 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 "webrtc/base/objc/RTCFieldTrials.h"
-
-#include <memory>
-#include "webrtc/system_wrappers/include/field_trial_default.h"
-
-#import "webrtc/base/objc/RTCLogging.h"
-
-static NSString * const kRTCEnableSendSideBweString =
-    @"WebRTC-SendSideBwe/Enabled/";
-static std::unique_ptr<char[]> gFieldTrialInitString;
-
-void RTCInitFieldTrials(RTCFieldTrialOptions options) {
-  NSMutableString *fieldTrialInitString = [NSMutableString string];
-  if (options & RTCFieldTrialOptionsSendSideBwe) {
-    [fieldTrialInitString appendString:kRTCEnableSendSideBweString];
-  }
-  size_t len = fieldTrialInitString.length + 1;
-  gFieldTrialInitString.reset(new char[len]);
-  if (![fieldTrialInitString getCString:gFieldTrialInitString.get()
-                              maxLength:len
-                               encoding:NSUTF8StringEncoding]) {
-    RTCLogError(@"Failed to convert field trial string.");
-    return;
-  }
-  webrtc::field_trial::InitFieldTrialsFromString(gFieldTrialInitString.get());
-}