Add stats overlay to iOS AppRTCDemo.

webrtc/examples/objc/AppRTCDemo/ios/ARDStatsView.m

Index: webrtc/examples/objc/AppRTCDemo/ios/ARDStatsView.m
diff --git a/webrtc/examples/objc/AppRTCDemo/ios/ARDStatsView.m b/webrtc/examples/objc/AppRTCDemo/ios/ARDStatsView.m
new file mode 100644
index 0000000000000000000000000000000000000000..bcc538e2dd60db6c9b9c08b43b3ac015872f2ef6
--- /dev/null
+++ b/webrtc/examples/objc/AppRTCDemo/ios/ARDStatsView.m
@@ -0,0 +1,52 @@
+/*
+ *  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 "ARDStatsView.h"
+
+#import "RTCStatsReport.h"
+
+#import "ARDStatsBuilder.h"
+
+@implementation ARDStatsView {
+  UILabel *_statsLabel;
+  ARDStatsBuilder *_statsBuilder;
+}
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  if (self = [super initWithFrame:frame]) {
+    _statsLabel = [[UILabel alloc] initWithFrame:CGRectZero];
+    _statsLabel.numberOfLines = 0;
+    _statsLabel.font = [UIFont fontWithName:@"Roboto" size:12];
+    _statsLabel.adjustsFontSizeToFitWidth = YES;
+    _statsLabel.minimumScaleFactor = 0.6;
+    _statsLabel.textColor = [UIColor greenColor];
+    [self addSubview:_statsLabel];
+    self.backgroundColor = [UIColor colorWithWhite:0 alpha:.6];
+    _statsBuilder = [[ARDStatsBuilder alloc] init];
+  }
+  return self;
+}
+
+- (void)setStats:(NSArray *)stats {
+  for (RTCStatsReport *report in stats) {
+    [_statsBuilder parseStatsReport:report];
+  }
+  _statsLabel.text = _statsBuilder.statsString;
+}
+
+- (void)layoutSubviews {
+  _statsLabel.frame = self.bounds;
+}
+
+- (CGSize)sizeThatFits:(CGSize)size {
+  return [_statsLabel sizeThatFits:size];
+}
+
+@end