Merge from Apple-Shared-Source.

Author: Edward Smith

Branch-SDK-Tests/Branch-SDK-Tests/BNCKeyChain.Test.m

@@ -10,7 +10,7 @@
 
 #import "BNCTestCase.h"
 #import "BNCKeyChain.h"
-#import "BNCApplication.h"
+//#import "BNCApplication.h"
 
 @interface BNCKeyChainTest : BNCTestCase
 @end
@@ -46,6 +46,7 @@ - (void)testKeyChain {
     value = [BNCKeyChain retrieveValueForService:kServiceName key:@"key3" error:&error];
     XCTAssertTrue(value == nil && error.code == errSecItemNotFound);
 
+    // TODO: Fix this.
     if ([UIApplication sharedApplication] == nil) {
         NSLog(@"No host application for keychain testing!");
         return;