Make EarlGrey matchers compliant with Chromium style.

ios/chrome/browser/ui/settings/accounts_collection_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 <EarlGrey/EarlGrey.h>
 #import <XCTest/XCTest.h>
 
 #include "base/strings/sys_string_conversions.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/strings/grit/components_strings.h"
@@ skipping 33 matching lines @@
   // collection view might duplicate it (with the old one being hidden but
   // EarlGrey can find it).
   id<GREYMatcher> matcher = grey_allOf(grey_accessibilityID(accessiblity_id),
                                        grey_sufficientlyVisible(), nil);
   [[EarlGrey selectElementWithMatcher:matcher] performAction:grey_tap()];
 }
 
 // Taps the button with accessibility label |label|.
 void TapButtonWithAccessibilityLabel(NSString* label) {
   id<GREYMatcher> matcher =
-      chrome_test_util::buttonWithAccessibilityLabel(label);
+      chrome_test_util::ButtonWithAccessibilityLabel(label);
   [[EarlGrey selectElementWithMatcher:matcher] performAction:grey_tap()];
 }
 
 // Taps the button with accessibility labelId |message_id|.
 void TapButtonWithLabelId(int message_id) {
   id<GREYMatcher> matcher =
-      chrome_test_util::buttonWithAccessibilityLabelId(message_id);
+      chrome_test_util::ButtonWithAccessibilityLabelId(message_id);
   [[EarlGrey selectElementWithMatcher:matcher] performAction:grey_tap()];
 }
 
 // Opens the signin screen from the settings page. Assumes the tools menu is
 // accessible. User must not be signed in.
 void OpenSignInFromSettings() {
   const CGFloat scroll_displacement = 50.0;
 
   [ChromeEarlGreyUI openToolsMenu];
   [[[EarlGrey
@@ skipping 233 matching lines @@
   // Check that Account Settings screen is open and |identity| is signed in.
   [[EarlGrey selectElementWithMatcher:grey_accessibilityID(kSettingsAccountsId)]
       assertWithMatcher:grey_sufficientlyVisible()];
   AssertAuthenticatedIdentityInActiveProfile(identity);
 
   // Close Settings.
   TapButtonWithLabelId(IDS_IOS_NAVIGATION_BAR_DONE_BUTTON);
 }
 
 @end