Fix Core CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF warnings (firebase#779)

Author: paulb777

Firebase/Core/FIRMutableDictionary.m

@@ -37,41 +37,41 @@ - (instancetype)init {
 - (NSString *)description {
   __block NSString *description;
   dispatch_sync(_queue, ^{
-    description = _objects.description;
+    description = self->_objects.description;
   });
   return description;
 }
 
 - (id)objectForKey:(id)key {
   __block id object;
   dispatch_sync(_queue, ^{
-    object = _objects[key];
+    object = self->_objects[key];
   });
   return object;
 }
 
 - (void)setObject:(id)object forKey:(id<NSCopying>)key {
   dispatch_async(_queue, ^{
-    _objects[key] = object;
+    self->_objects[key] = object;
   });
 }
 
 - (void)removeObjectForKey:(id)key {
   dispatch_async(_queue, ^{
-    [_objects removeObjectForKey:key];
+    [self->_objects removeObjectForKey:key];
   });
 }
 
 - (void)removeAllObjects {
   dispatch_async(_queue, ^{
-    [_objects removeAllObjects];
+    [self->_objects removeAllObjects];
   });
 }
 
 - (NSUInteger)count {
   __block NSUInteger count;
   dispatch_sync(_queue, ^{
-    count = _objects.count;
+    count = self->_objects.count;
   });
   return count;
 }
@@ -89,7 +89,7 @@ - (void)setObject:(id)obj forKeyedSubscript:(id<NSCopying>)key {
 - (NSDictionary *)dictionary {
   __block NSDictionary *dictionary;
   dispatch_sync(_queue, ^{
-    dictionary = [_objects copy];
+    dictionary = [self->_objects copy];
   });
   return dictionary;
 }

Firebase/Core/FIRNetworkURLSession.m

@@ -314,11 +314,11 @@ - (void)URLSession:(NSURLSession *)session
       if (allow) {
         completionHandler(NSURLSessionAuthChallengeUseCredential, credential);
       } else {
-        [_loggerDelegate
+        [self->_loggerDelegate
             firNetwork_logWithLevel:kFIRNetworkLogLevelDebug
                         messageCode:kFIRNetworkMessageCodeURLSession007
                             message:@"Cancelling authentication challenge for host. Host"
-                            context:_request.URL];
+                            context:self->_request.URL];
         completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil);
       }
     };
@@ -344,10 +344,10 @@ - (void)URLSession:(NSURLSession *)session
       }
 
       if (trustError != errSecSuccess) {
-        [_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelError
-                                     messageCode:kFIRNetworkMessageCodeURLSession008
-                                         message:@"Cannot evaluate server trust. Error, host"
-                                        contexts:@[ @(trustError), _request.URL ]];
+        [self->_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelError
+                                           messageCode:kFIRNetworkMessageCodeURLSession008
+                                               message:@"Cannot evaluate server trust. Error, host"
+                                              contexts:@[ @(trustError), self->_request.URL ]];
         shouldAllow = NO;
       } else {
         // Having a trust level "unspecified" by the user is the usual result, described at
@@ -651,7 +651,7 @@ - (void)callCompletionHandler:(FIRNetworkURLSessionCompletionHandler)handler
 
   if (handler) {
     dispatch_async(dispatch_get_main_queue(), ^{
-      handler(response, data, _sessionID, error);
+      handler(response, data, self->_sessionID, error);
     });
   }
 }

Firebase/Core/FIROptions.m

@@ -367,7 +367,7 @@ - (NSDictionary *)analyticsOptionsDictionaryWithInfoDictionary:(NSDictionary *)i
       }
       tempAnalyticsOptions[key] = value;
     }
-    _analyticsOptionsDictionary = tempAnalyticsOptions;
+    self->_analyticsOptionsDictionary = tempAnalyticsOptions;
   });
   return _analyticsOptionsDictionary;
 }