Make EarlGrey matchers compliant with Chromium style.

ios/chrome/browser/ui/keyboard_commands_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 "components/strings/grit/components_strings.h"
 #import "ios/chrome/browser/ui/browser_view_controller.h"
 #import "ios/chrome/browser/ui/commands/generic_chrome_command.h"
@@ skipping 118 matching lines @@
 - (void)testKeyboardCommandsNotRegistered_SettingsPresented {
   // Open Settings
   id<GREYMatcher> toolsMenuSettings =
       grey_accessibilityID(kToolsMenuSettingsId);
   [self selectToolsMenuItem:toolsMenuSettings];
 
   [self verifyNoKeyboardCommandsAreRegistered];
 
   // Close Settings
   id<GREYMatcher> settingsDoneButton =
-      chrome_test_util::buttonWithAccessibilityLabelId(
+      chrome_test_util::ButtonWithAccessibilityLabelId(
           IDS_IOS_NAVIGATION_BAR_DONE_BUTTON);
   [[EarlGrey selectElementWithMatcher:settingsDoneButton]
       performAction:grey_tap()];
 }
 
 // Tests that keyboard commands are not registered when the bookmark UI is
 // shown.
 - (void)testKeyboardCommandsNotRegistered_AddBookmarkPresented {
   [self verifyBookmarksLoaded];
   BOOL success = chrome_test_util::ClearBookmarks();
   GREYAssert(success, @"Not all bookmarks were removed.");
 
   // Bookmark page
   if (IsIPadIdiom()) {
     id<GREYMatcher> bookmarkMatcher =
-        chrome_test_util::buttonWithAccessibilityLabelId(IDS_TOOLTIP_STAR);
+        chrome_test_util::ButtonWithAccessibilityLabelId(IDS_TOOLTIP_STAR);
     [[EarlGrey selectElementWithMatcher:bookmarkMatcher]
         performAction:grey_tap()];
   } else {
     [ChromeEarlGreyUI openToolsMenu];
     id<GREYMatcher> bookmarkMatcher = grey_accessibilityLabel(@"Add Bookmark");
     [[EarlGrey selectElementWithMatcher:bookmarkMatcher]
         performAction:grey_tap()];
   }
 
   // Tap on the HUD.
-  id<GREYMatcher> edit = chrome_test_util::buttonWithAccessibilityLabelId(
+  id<GREYMatcher> edit = chrome_test_util::ButtonWithAccessibilityLabelId(
       IDS_IOS_NAVIGATION_BAR_EDIT_BUTTON);
   [[EarlGrey selectElementWithMatcher:edit] performAction:grey_tap()];
 
   [self waitForSingleBookmarkEditorToDisplay];
 
   [self verifyNoKeyboardCommandsAreRegistered];
 
   id<GREYMatcher> cancel = grey_accessibilityID(@"Cancel");
   [[EarlGrey selectElementWithMatcher:cancel] performAction:grey_tap()];
 }
@@ skipping 42 matching lines @@
   [self verifyKeyboardCommandsAreRegistered];
 
   UIResponder* firstResponder = GetFirstResponder();
   GREYAssert(
       [firstResponder isKindOfClass:NSClassFromString(@"WKContentView")],
       @"Expected first responder to be a WKContentView. Instead, is a %@",
       NSStringFromClass([firstResponder class]));
 }
 
 @end