Add web shell test to navigate with fragment link.

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

Index: ios/web/shell/test/earl_grey/shell_matchers.mm
diff --git a/ios/web/shell/test/earl_grey/shell_matchers.mm b/ios/web/shell/test/earl_grey/shell_matchers.mm
index ce7762dd372237223d8583d9ff9b9e97701ab6b0..0241ca6e0de851999644931534cecae18b144e41 100644
--- a/ios/web/shell/test/earl_grey/shell_matchers.mm
+++ b/ios/web/shell/test/earl_grey/shell_matchers.mm
@@ -67,7 +67,7 @@ id<GREYMatcher> addressField() {
   };
 
   DescribeToBlock describe = ^(id<GREYDescription> description) {
-    [description appendText:@"web view containing "];
+    [description appendText:@"address field containing "];
     [description appendText:text];
   };