WebViewProxy now propagates first responder status to the webview.

ios/web/web_state/ui/crw_web_view_content_view.mm

 // Copyright 2015 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/public/web_state/ui/crw_web_view_content_view.h"
 
 #import <WebKit/WebKit.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
@@ skipping 64 matching lines @@
     self.autoresizingMask =
         UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
     [self addSubview:_webView];
     self.backgroundColor = [UIColor colorWithRed:kBackgroundRGBComponents[0]
                                            green:kBackgroundRGBComponents[1]
                                             blue:kBackgroundRGBComponents[2]
                                            alpha:1.0];
   }
 }
 
+- (BOOL)becomeFirstResponder {
+  return [_webView becomeFirstResponder];
+}
+
 #pragma mark Accessors
 
 - (UIScrollView*)scrollView {
   return _scrollView.get();
 }
 
 - (UIView*)webView {
   return _webView.get();
 }
 
@@ skipping 32 matching lines @@
 
 - (void)updateWebViewFrame {
   CGRect webViewFrame = self.bounds;
   webViewFrame.size.height -= _topContentPadding;
   webViewFrame.origin.y += _topContentPadding;
 
   self.webView.frame = webViewFrame;
 }
 
 @end