[CRD iOS] Fix typo in ClientKeyboard

There are duplicated lines of _autocorrectionType but the second one is
supposed to be _keyboardAppearance. UIKeyboardAppearanceDefault is the
default value so we weren't seeing bugs before.

Change-Id: I3c91a3496e62f778259c13fd6132ffbc28633ebd
Reviewed-on: https://chromium-review.googlesource.com/744979Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
Commit-Queue: Yuwei Huang <yuweih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512889}

remoting/ios/client_keyboard.mm

@@ -37,7 +37,7 @@
   if (self) {
     _autocapitalizationType = UITextAutocapitalizationTypeNone;
     _autocorrectionType = UITextAutocorrectionTypeNo;
-    _autocorrectionType = UITextAutocorrectionTypeNo;
+    _keyboardAppearance = UIKeyboardAppearanceDefault;
     _keyboardType = UIKeyboardTypeDefault;
     _spellCheckingType = UITextSpellCheckingTypeNo;