Make EarlGrey matchers compliant with Chromium style.

ios/chrome/browser/web/browsing_prevent_default_egtest.mm

Index: ios/chrome/browser/web/browsing_prevent_default_egtest.mm
diff --git a/ios/chrome/browser/web/browsing_prevent_default_egtest.mm b/ios/chrome/browser/web/browsing_prevent_default_egtest.mm
index 3cce037acea62c4fb8aadacd2f177f8ae36d1e28..cd6e9558b9c42cb5328ac23d919931893ee1d3de 100644
--- a/ios/chrome/browser/web/browsing_prevent_default_egtest.mm
+++ b/ios/chrome/browser/web/browsing_prevent_default_egtest.mm
@@ -97,7 +97,7 @@ class ScopedBlockPopupsPref {
       conditionWithName:@"Waiting for webview to display 'Click done'."
                   block:^BOOL {
                     id<GREYMatcher> webViewMatcher =
-                        chrome_test_util::webViewContainingText("Click done");
+                        chrome_test_util::WebViewContainingText("Click done");
                     NSError* error = nil;
                     [[EarlGrey selectElementWithMatcher:webViewMatcher]
                         assertWithMatcher:grey_notNil()
@@ -152,7 +152,7 @@ class ScopedBlockPopupsPref {
       conditionWithName:@"Waiting for webview to display 'Click done'."
                   block:^BOOL {
                     id<GREYMatcher> webViewMatcher =
-                        chrome_test_util::webViewContainingText("Click done");
+                        chrome_test_util::WebViewContainingText("Click done");
                     NSError* error = nil;
                     [[EarlGrey selectElementWithMatcher:webViewMatcher]
                         assertWithMatcher:grey_notNil()