WebViewProxy now propagates first responder status to the webview.

ios/web/web_state/crw_web_view_proxy_impl.mm

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/web/web_state/crw_web_view_proxy_impl.h"
 
 #include "base/ios/ios_util.h"
 #include "base/ios/weak_nsobject.h"
 #include "base/mac/scoped_nsobject.h"
 #import "ios/web/public/web_state/crw_web_view_scroll_view_proxy.h"
@@ skipping 156 matching lines @@
 - (BOOL)keyboardDisplayRequiresUserAction {
   return [_webController keyboardDisplayRequiresUserAction];
 }
 
 - (void)setKeyboardDisplayRequiresUserAction:
         (BOOL)keyboardDisplayRequiresUserAction {
   [_webController
       setKeyboardDisplayRequiresUserAction:keyboardDisplayRequiresUserAction];
 }
 
+- (BOOL)becomeFirstResponder {
+  return [_contentView becomeFirstResponder];
+}
+
 @end