Tadeu Zagallo c6240c7441 [ReactNative] Ensure WebViewExecutor's webview is created on the main thread
Summary:
Fixes #2464

After the bridge parallelisation of the bridge initialisation the executors
were being `setUp` in a background thread, and the `RCTWebViewExecutor` was
crashing when creating a `UIWebView` out of the main thread.

Wrap the `UIWebView` creation in a call to the main thread.
2015-09-01 05:16:43 -08:00
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