Make EarlGrey matchers compliant with Chromium style.

ios/chrome/browser/ui/sync/sync_fake_server_egtest.mm

Index: ios/chrome/browser/ui/sync/sync_fake_server_egtest.mm
diff --git a/ios/chrome/browser/ui/sync/sync_fake_server_egtest.mm b/ios/chrome/browser/ui/sync/sync_fake_server_egtest.mm
index 1dcfe02304ebf2332752123ef51988e2f5b738cb..686ec5f75ac1bf597c7c76076527633ea39281e8 100644
--- a/ios/chrome/browser/ui/sync/sync_fake_server_egtest.mm
+++ b/ios/chrome/browser/ui/sync/sync_fake_server_egtest.mm
@@ -75,18 +75,18 @@ void OpenSignInFromSettings() {
 void SignInIdentity(NSString* userEmail) {
   OpenSignInFromSettings();
   [[EarlGrey
-      selectElementWithMatcher:chrome_test_util::buttonWithAccessibilityLabel(
+      selectElementWithMatcher:chrome_test_util::ButtonWithAccessibilityLabel(
                                    userEmail)] performAction:grey_tap()];
   [[EarlGrey selectElementWithMatcher:
-                 chrome_test_util::buttonWithAccessibilityLabelId(
+                 chrome_test_util::ButtonWithAccessibilityLabelId(
                      IDS_IOS_ACCOUNT_CONSISTENCY_SETUP_SIGNIN_BUTTON)]
       performAction:grey_tap()];
   [[EarlGrey selectElementWithMatcher:
-                 chrome_test_util::buttonWithAccessibilityLabelId(
+                 chrome_test_util::ButtonWithAccessibilityLabelId(
                      IDS_IOS_ACCOUNT_CONSISTENCY_CONFIRMATION_OK_BUTTON)]
       performAction:grey_tap()];
   [[EarlGrey
-      selectElementWithMatcher:chrome_test_util::buttonWithAccessibilityLabelId(
+      selectElementWithMatcher:chrome_test_util::ButtonWithAccessibilityLabelId(
                                    IDS_DONE)] performAction:grey_tap()];
 }