Context menu egtests, plus related utilities.

ios/web/public/test/earl_grey/web_view_matchers.h

Index: ios/web/public/test/earl_grey/web_view_matchers.h
diff --git a/ios/web/public/test/earl_grey/web_view_matchers.h b/ios/web/public/test/earl_grey/web_view_matchers.h
index 70e05e5bedf847df31eb019942f08f6bdf21def7..ec7e52cbbc10bee5772ce3a0a95fd8a73316d947 100644
--- a/ios/web/public/test/earl_grey/web_view_matchers.h
+++ b/ios/web/public/test/earl_grey/web_view_matchers.h
@@ -2,7 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import <string>
+#ifndef IOS_WEB_PUBLIC_TEST_EARL_GREY_WEB_VIEW_MATCHERS_H_
+#define IOS_WEB_PUBLIC_TEST_EARL_GREY_WEB_VIEW_MATCHERS_H_
+
+#include <string>
 
 #import <EarlGrey/EarlGrey.h>
 
@@ -14,18 +17,22 @@ namespace web {
 id<GREYMatcher> webViewInWebState(WebState* web_state);
 
 // Matcher for WKWebView containing |text|.
-id<GREYMatcher> webViewContainingText(std::string text, WebState* web_state);
+id<GREYMatcher> webViewContainingText(const std::string& text,
+                                      WebState* web_state);
 
 // Matcher for WKWebView containing a blocked |image_id|.  When blocked, the
 // image will be smaller than |expected_size|.
-id<GREYMatcher> webViewContainingBlockedImage(std::string image_id,
+id<GREYMatcher> webViewContainingBlockedImage(const std::string& image_id,
                                               CGSize expected_size,
                                               WebState* web_state);
 
 // Matcher for WKWebView containing an html element which matches |selector|.
-id<GREYMatcher> webViewCssSelector(std::string selector, WebState* web_state);
+id<GREYMatcher> webViewCssSelector(const std::string& selector,
+                                   WebState* web_state);
 
 // Matcher for WKWebView's scroll view.
 id<GREYMatcher> webViewScrollView(WebState* web_state);
 
 }  // namespace web
+
+#endif  // IOS_WEB_PUBLIC_TEST_EARL_GREY_WEB_VIEW_MATCHERS_H_