Use 15fps for iPhone 4S

webrtc/sdk/BUILD.gn

 # 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("../build/webrtc.gni")
 import("//build_overrides/webrtc.gni")
@@ skipping 37 matching lines @@
       "objc/Framework/Headers/WebRTC/RTCMetrics.h",
       "objc/Framework/Headers/WebRTC/RTCMetricsSampleInfo.h",
       "objc/Framework/Headers/WebRTC/RTCSSLAdapter.h",
       "objc/Framework/Headers/WebRTC/RTCTracing.h",
     ]
     if (is_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",
       ]
       libs = [ "AVFoundation.framework" ]
     }
     if (!build_with_chromium) {
       sources += [
         "objc/Framework/Classes/RTCFileLogger.mm",
         "objc/Framework/Headers/WebRTC/RTCFileLogger.h",
       ]
     }
   }
@@ skipping 121 matching lines @@
     ]
 
     deps = [
       ":rtc_sdk_common_objc",
       "../api:libjingle_peerconnection",
     ]
   }
 
   # TODO(tkchin): Add the rtc_sdk_framework_objc target.
 }