Add web shell matcher for address field.

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

Index: ios/web/shell/test/earl_grey/shell_matchers.h
diff --git a/ios/web/shell/test/earl_grey/shell_matchers.h b/ios/web/shell/test/earl_grey/shell_matchers.h
index 2cd70a9616a35c4bb7c161d4f438ba7e023cbeb0..ae9c30da33f69ed8a6d74dbb667e4231cc696c7e 100644
--- a/ios/web/shell/test/earl_grey/shell_matchers.h
+++ b/ios/web/shell/test/earl_grey/shell_matchers.h
@@ -9,6 +9,9 @@ namespace web {
 // Shorthand for GREYMatchers::matcherForWebViewContainingText.
 id<GREYMatcher> webViewContainingText(NSString* text);
 
+// Shorthand for GREYMatchers::matcherForAddressFieldEqualToText.
+id<GREYMatcher> addressFieldText(NSString* text);
+
 // Shorthand for GREYMatchers::matcherForBackButton.
 id<GREYMatcher> backButton();
 
@@ -25,6 +28,9 @@ id<GREYMatcher> addressField();
 // Matcher for WKWebView containing |text|.
 + (id<GREYMatcher>)matcherForWebViewContainingText:(NSString*)text;
 
+// Matcher for web shell address field text property equal to |text|.
++ (id<GREYMatcher>)matcherForAddressFieldEqualToText:(NSString*)text;
+
 // Matcher for back button in web shell.
 + (id<GREYMatcher>)matcherForWebShellBackButton;