Minor ObjC API tweaks.

Adds setConfiguration back and renames statsId back to reportId.

BUG=

Review URL: https://codereview.webrtc.org/1778033002

Cr-Commit-Position: refs/heads/master@{#11936}

talk/build/build_ios_libs.sh

@@ -73,7 +73,8 @@ function build_webrtc {
   else
     FLAVOR="${FLAVOR}-iphonesimulator"
   fi
-  export GYP_DEFINES="OS=ios target_arch=${TARGET_ARCH} clang_xcode=1"
+  export GYP_DEFINES="OS=ios target_arch=${TARGET_ARCH} use_objc_h264=1 \
+clang_xcode=1"
   export GYP_GENERATORS="ninja"
   export GYP_GENERATOR_FLAGS="output_dir=${OUTPUT_DIR}"
   webrtc/build/gyp_webrtc talk/build/merge_ios_libs.gyp

webrtc/api/objc/RTCPeerConnection.h

@@ -129,6 +129,14 @@ typedef NS_ENUM(NSInteger, RTCStatsOutputLevel) {
     (nullable id<RTCPeerConnectionDelegate>)delegate
     NS_DESIGNATED_INITIALIZER;
 
+/** Sets the PeerConnection's global configuration to |configuration|.
+ *  Any changes to STUN/TURN servers or ICE candidate policy will affect the
+ *  next gathering phase, and cause the next call to createOffer to generate
+ *  new ICE credentials. Note that the BUNDLE and RTCP-multiplexing policies
+ *  cannot be changed with this method.
+ */
+- (BOOL)setConfiguration:(RTCConfiguration *)configuration;
+
 /** Terminate all media and close the transport. */
 - (void)close;
 

webrtc/api/objc/RTCPeerConnection.mm

@@ -248,6 +248,10 @@ void PeerConnectionDelegateAdapter::OnIceCandidate(
       _peerConnection->ice_gathering_state()];
 }
 
+- (BOOL)setConfiguration:(RTCConfiguration *)configuration {
+  return _peerConnection->SetConfiguration(configuration.nativeConfiguration);
+}
+
 - (void)close {
   _peerConnection->Close();
 }

webrtc/api/objc/RTCStatsReport.h

@@ -22,7 +22,7 @@ NS_ASSUME_NONNULL_BEGIN
 @property(nonatomic, readonly) NSString *type;
 
 /** The identifier for this object. */
-@property(nonatomic, readonly) NSString *statsId;
+@property(nonatomic, readonly) NSString *reportId;
 
 /** A dictionary holding the actual stats. */
 @property(nonatomic, readonly) NSDictionary<NSString *, NSString *> *values;

webrtc/api/objc/RTCStatsReport.mm

@@ -20,12 +20,12 @@
 
 @synthesize timestamp = _timestamp;
 @synthesize type = _type;
-@synthesize statsId = _statsId;
+@synthesize reportId = _reportId;
 @synthesize values = _values;
 
 - (NSString *)description {
   return [NSString stringWithFormat:@"RTCStatsReport:\n%@\n%@\n%f\n%@",
-                                    _statsId,
+                                    _reportId,
                                     _type,
                                     _timestamp,
                                     _values];
@@ -37,7 +37,7 @@
   if (self = [super init]) {
     _timestamp = nativeReport.timestamp();
     _type = [NSString stringForStdString:nativeReport.TypeToString()];
-    _statsId = [NSString stringForStdString:
+    _reportId = [NSString stringForStdString:
         nativeReport.id()->ToString()];
 
     NSUInteger capacity = nativeReport.values().size();