Add web shell test to navigate with fragment link.

ios/web/shell/test/earl_grey/shell_matchers.mm

 // Copyright 2016 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/shell/test/earl_grey/shell_matchers.h"
 
 #import "base/mac/foundation_util.h"
 #include "base/test/ios/wait_util.h"
 #include "ios/testing/earl_grey/wait_util.h"
 #import "ios/web/public/web_state/web_state.h"
@@ skipping 49 matching lines @@
       if ([textField.text isEqualToString:text]) {
         return YES;
       }
       base::test::ios::SpinRunLoopWithMaxDelay(
           base::TimeDelta::FromSecondsD(testing::kSpinDelaySeconds));
     }
     return NO;
   };
 
   DescribeToBlock describe = ^(id<GREYDescription> description) {
-    [description appendText:@"web view containing "];
+    [description appendText:@"address field containing "];
     [description appendText:text];
   };
 
   return [[[GREYElementMatcherBlock alloc] initWithMatchesBlock:matches
                                                descriptionBlock:describe]
       autorelease];
 }
 
 + (id<GREYMatcher>)matcherForWebShellBackButton {
   return grey_accessibilityLabel(kWebShellBackButtonAccessibilityLabel);
 }
 
 + (id<GREYMatcher>)matcherForWebShellForwardButton {
   return grey_accessibilityLabel(kWebShellForwardButtonAccessibilityLabel);
 }
 
 + (id<GREYMatcher>)matcherForWebShellAddressField {
   return grey_accessibilityLabel(kWebShellAddressFieldAccessibilityLabel);
 }
 
 @end