Removed uses of IsRunningOnIOS9OrLater in crw_web_ or wk_web_view_

ios/web/web_state/ui/crw_web_controller.mm

 // Copyright 2012 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/ui/crw_web_controller.h"
 
 #import <WebKit/WebKit.h>
 
 #import <objc/runtime.h>
 #include <stddef.h>
@@ skipping 5020 matching lines @@
 
   handler(allowNavigation ? WKNavigationResponsePolicyAllow
                           : WKNavigationResponsePolicyCancel);
 }
 
 // TODO(stuartmorgan): Move all the guesswork around these states out of the
 // superclass, and wire these up to the remaining methods.
 - (void)webView:(WKWebView*)webView
     didStartProvisionalNavigation:(WKNavigation*)navigation {
   GURL webViewURL = net::GURLWithNSURL(webView.URL);
-  if (webViewURL.is_empty() && base::ios::IsRunningOnIOS9OrLater()) {
+  if (webViewURL.is_empty()) {
     // May happen on iOS9, however in didCommitNavigation: callback the URL
-    // will be "about:blank". TODO(eugenebut): File radar for this issue
-    // (crbug.com/523549).
+    // will be "about:blank".
     webViewURL = GURL(url::kAboutBlankURL);
   }
 
   // Intercept renderer-initiated navigations. If this navigation has not yet
   // been registered, do so. loadPhase check is necessary because
   // lastRegisteredRequestURL may be the same as the webViewURL on a new tab
   // created by window.open (default is about::blank).
   if (_lastRegisteredRequestURL != webViewURL ||
       self.loadPhase != web::LOAD_REQUESTED) {
     // Reset current WebUI if one exists.
@@ skipping 594 matching lines @@
   }
 
   return web::WEB_VIEW_DOCUMENT_TYPE_GENERIC;
 }
 
 - (NSString*)refererFromNavigationAction:(WKNavigationAction*)action {
   return [action.request valueForHTTPHeaderField:@"Referer"];
 }
 
 @end