iOS: Move AppRTC logging methods to public headers.

talk/examples/objc/AppRTCDemo/ARDAppEngineClient.m

Index: talk/examples/objc/AppRTCDemo/ARDAppEngineClient.m
diff --git a/talk/examples/objc/AppRTCDemo/ARDAppEngineClient.m b/talk/examples/objc/AppRTCDemo/ARDAppEngineClient.m
index 0b33325c893030ef917c9347b34f63ae3a34ce13..de3f9f70461831051c20cbb7d5ba0cd3f0011b6a 100644
--- a/talk/examples/objc/AppRTCDemo/ARDAppEngineClient.m
+++ b/talk/examples/objc/AppRTCDemo/ARDAppEngineClient.m
@@ -27,8 +27,9 @@
 
 #import "ARDAppEngineClient.h"
 
+#import "RTCLogging.h"
+
 #import "ARDJoinResponse.h"
-#import "ARDLogging.h"
 #import "ARDMessageResponse.h"
 #import "ARDSignalingMessage.h"
 #import "ARDUtilities.h"
@@ -58,7 +59,7 @@ static NSInteger const kARDAppEngineClientErrorBadResponse = -1;
   NSString *urlString =
       [NSString stringWithFormat:kARDRoomServerJoinFormat, roomId];
   NSURL *roomURL = [NSURL URLWithString:urlString];
-  ARDLog(@"Joining room:%@ on room server.", roomId);
+  RTCLog(@"Joining room:%@ on room server.", roomId);
   NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:roomURL];
   request.HTTPMethod = @"POST";
   __weak ARDAppEngineClient *weakSelf = self;
@@ -102,7 +103,7 @@ static NSInteger const kARDAppEngineClientErrorBadResponse = -1;
       [NSString stringWithFormat:
           kARDRoomServerMessageFormat, roomId, clientId];
   NSURL *url = [NSURL URLWithString:urlString];
-  ARDLog(@"C->RS POST: %@", message);
+  RTCLog(@"C->RS POST: %@", message);
   NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
   request.HTTPMethod = @"POST";
   request.HTTPBody = data;
@@ -148,19 +149,19 @@ static NSInteger const kARDAppEngineClientErrorBadResponse = -1;
   NSError *error = nil;
   // We want a synchronous request so that we know that we've left the room on
   // room server before we do any further work.
-  ARDLog(@"C->RS: BYE");
+  RTCLog(@"C->RS: BYE");
   [NSURLConnection sendSynchronousRequest:request
                         returningResponse:&response
                                     error:&error];
   if (error) {
-    ARDLog(@"Error leaving room %@ on room server: %@",
+    RTCLogError(@"Error leaving room %@ on room server: %@",
           roomId, error.localizedDescription);
     if (completionHandler) {
       completionHandler(error);
     }
     return;
   }
-  ARDLog(@"Left room:%@ on room server.", roomId);
+  RTCLog(@"Left room:%@ on room server.", roomId);
   if (completionHandler) {
     completionHandler(nil);
   }