iOS: ignore double registration of lazy modules with chrome attached

Summary: Depending on when Chrome debugger is attached, modules may get double registered. Simply ignore it for this case. The redbox was not a fatal error, which can be dismissed.

Reviewed By: shergin

Differential Revision: D12996107

fbshipit-source-id: 292f63102337077848842ca46b3daed08b1cae12

React/CxxBridge/RCTCxxBridge.mm

@@ -666,10 +666,8 @@ - (void)registerExtraLazyModules
           // The new module returned nil from init, so use the old module
           continue;
         } else if ([moduleData.moduleClass new] != nil) {
-          // Both modules were non-nil, so it's unclear which should take precedence
-          RCTLogError(@"Attempted to register RCTBridgeModule class %@ for the "
-                      "name '%@', but name was already registered by class %@",
-                      moduleClass, moduleName, moduleData.moduleClass);
+          // Use existing module since it was already loaded but not yet instantiated.
+          continue;
         }
       }