Use 15fps for iPhone 4S

webrtc/sdk/sdk.gyp

 # 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.
 
 {
   'includes': [
@@ skipping 39 matching lines @@
             'objc/Framework/Headers/WebRTC/RTCMetricsSampleInfo.h',
             'objc/Framework/Headers/WebRTC/RTCSSLAdapter.h',
             'objc/Framework/Headers/WebRTC/RTCTracing.h',
           ],
           'conditions': [
             ['OS=="ios"', {
               'sources': [
                 'objc/Framework/Classes/RTCCameraPreviewView.m',
                 'objc/Framework/Classes/RTCUIApplication.h',
                 'objc/Framework/Classes/RTCUIApplication.mm',
+                'objc/Framework/Classes/UIDevice+RTCDevice.mm',
                 'objc/Framework/Headers/WebRTC/RTCCameraPreviewView.h',
+                'objc/Framework/Headers/WebRTC/UIDevice+RTCDevice.h',
               ],
               'link_settings': {
                 'xcode_settings': {
                   'OTHER_LDFLAGS': [
                     '-framework AVFoundation',
                   ],
                 },
               },
             }],  # OS=="ios"
             ['build_with_chromium==0', {
@@ skipping 195 matching lines @@
             'objc/Framework/Headers/WebRTC/RTCRtpReceiver.h',
             'objc/Framework/Headers/WebRTC/RTCRtpSender.h',
             'objc/Framework/Headers/WebRTC/RTCSessionDescription.h',
             'objc/Framework/Headers/WebRTC/RTCSSLAdapter.h',
             'objc/Framework/Headers/WebRTC/RTCStatsReport.h',
             'objc/Framework/Headers/WebRTC/RTCTracing.h',
             'objc/Framework/Headers/WebRTC/RTCVideoFrame.h',
             'objc/Framework/Headers/WebRTC/RTCVideoRenderer.h',
             'objc/Framework/Headers/WebRTC/RTCVideoSource.h',
             'objc/Framework/Headers/WebRTC/RTCVideoTrack.h',
+            'objc/Framework/Headers/WebRTC/UIDevice+RTCDevice.h',
             'objc/Framework/Headers/WebRTC/WebRTC.h',
           ],
           'dependencies': [
             '<(webrtc_root)/system_wrappers/system_wrappers.gyp:field_trial_default',
             '<(webrtc_root)/system_wrappers/system_wrappers.gyp:metrics_default',
             'rtc_sdk_peerconnection_objc',
           ],
           'xcode_settings': {
             'CODE_SIGNING_REQUIRED': 'NO',
             'CODE_SIGN_IDENTITY': '',
@@ skipping 27 matching lines @@
               'mac_framework_headers!': [
                 'objc/Framework/Headers/WebRTC/RTCFileLogger.h',
               ],
             }],
           ],  # conditions
         }, # rtc_sdk_framework_objc
       ],  # targets
     }],  # OS=="ios" or (OS=="mac" and mac_deployment_target=="10.7")
   ],
 }