Add web shell matcher for address field.

ios/web/shell/test/web_shell_navigation_egtest.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 <UIKit/UIKit.h>
 #import <WebKit/WebKit.h>
 #import <XCTest/XCTest.h>
 
 #import <EarlGrey/EarlGrey.h>
 
@@ skipping 35 matching lines @@
   [super tearDown];
   web::test::HttpServer& server = web::test::HttpServer::GetSharedInstance();
   server.RemoveAllResponseProviders();
 }
 
 // Tests the back and forward button after entering two URLs.
 - (void)testWebScenarioBrowsingBackAndForward {
   // Create map of canned responses and set up the test HTML server.
   std::map<GURL, std::string> responses;
   const GURL URL1 = web::test::HttpServer::MakeUrl("http://firstURL");
+  NSString* URL1Text = base::SysUTF8ToNSString(URL1.spec());
   NSString* response1 = @"Test Page 1";
   responses[URL1] = base::SysNSStringToUTF8(response1);
 
   const GURL URL2 = web::test::HttpServer::MakeUrl("http://secondURL");
+  NSString* URL2Text = base::SysUTF8ToNSString(URL2.spec());
   NSString* response2 = @"Test Page 2";
   responses[URL2] = base::SysNSStringToUTF8(response2);
 
   web::test::SetUpSimpleHttpServer(responses);
 
   web::WebState* webState = web::web_shell_test_util::GetCurrentWebState();
 
   web::navigation_test_util::LoadUrl(webState, URL1);
-
+  [[EarlGrey selectElementWithMatcher:web::addressFieldText(URL1Text)]

[Eugene But (OOO till 7-30), 2016/05/09 15:59:08]

Can be changed later.

Sounds like your matcher should take GURL instead of NSString. Do you see any
cases where it actually needs NSString?

[baxley, 2016/05/09 17:11:43]

Okay, I'll wait. I don't know if there's a case where there may be a search
query that isn't a GURL. It also is more tightly scoped to what the method needs
(it needs the text and nothing else).

+      assertWithMatcher:grey_notNil()];
   [[EarlGrey selectElementWithMatcher:web::webViewContainingText(response1)]
       assertWithMatcher:grey_notNil()];
 
   web::navigation_test_util::LoadUrl(webState, URL2);
-
+  [[EarlGrey selectElementWithMatcher:web::addressFieldText(URL2Text)]
+      assertWithMatcher:grey_notNil()];
   [[EarlGrey selectElementWithMatcher:web::webViewContainingText(response2)]
       assertWithMatcher:grey_notNil()];
 
   [[EarlGrey selectElementWithMatcher:web::backButton()]
       performAction:grey_tap()];
-
+  [[EarlGrey selectElementWithMatcher:web::addressFieldText(URL1Text)]
+      assertWithMatcher:grey_notNil()];
   [[EarlGrey selectElementWithMatcher:web::webViewContainingText(response1)]
       assertWithMatcher:grey_notNil()];
 
   [[EarlGrey selectElementWithMatcher:web::forwardButton()]
       performAction:grey_tap()];
-
+  [[EarlGrey selectElementWithMatcher:web::addressFieldText(URL2Text)]
+      assertWithMatcher:grey_notNil()];
   [[EarlGrey selectElementWithMatcher:web::webViewContainingText(response2)]
       assertWithMatcher:grey_notNil()];
 }
 
 @end