Updated error translation logic.

ios/web/web_state/ui/crw_ui_web_view_web_controller.mm

Index: ios/web/web_state/ui/crw_ui_web_view_web_controller.mm
diff --git a/ios/web/web_state/ui/crw_ui_web_view_web_controller.mm b/ios/web/web_state/ui/crw_ui_web_view_web_controller.mm
index 465a7761a26958becf1e8eec431c79365adddbfb..f56724f1139ec7a744c43687770af25e2eb49f11 100644
--- a/ios/web/web_state/ui/crw_ui_web_view_web_controller.mm
+++ b/ios/web/web_state/ui/crw_ui_web_view_web_controller.mm
@@ -4,6 +4,7 @@
 
 #import "ios/web/web_state/ui/crw_ui_web_view_web_controller.h"
 
+#import "base/ios/nserror_util.h"
 #import "base/ios/weak_nsobject.h"
 #include "base/json/json_reader.h"
 #include "base/json/string_escape.h"
@@ -35,6 +36,7 @@
 #import "ios/web/web_state/web_state_impl.h"
 #import "ios/web/web_state/web_view_creation_utils.h"
 #import "net/base/mac/url_conversions.h"
+#include "net/base/net_errors.h"
 #include "url/url_constants.h"
 
 namespace web {
@@ -804,8 +806,15 @@ const size_t kMaxMessageQueueSize = 262144;
   self.webScrollView.zoomScale = zoomScale;
 }
 
--(BOOL)shouldAbortLoadForCancelledURL:(const GURL&)cancelledURL {
-  return YES;
+- (BOOL)shouldAbortLoadForCancelledError:(NSError*)cancelledError {
+  // NSURLErrorCancelled errors generated by the Chrome net stack should be
+  // aborted.  If the error was generated by the UIWebView, it will not have
+  // an underlying net error and will be automatically retried by the web view.
+  DCHECK_EQ(cancelledError.code, NSURLErrorCancelled);
+  NSError* underlyingError =
+      base::nserror_util::GetFinalUnderlyingErrorFromError(cancelledError);
+  NSString* netDomain = base::SysUTF8ToNSString(net::kErrorDomain);
+  return [underlyingError.domain isEqualToString:netDomain];
 }
 
 #pragma mark - JS to ObjC messaging