Make EarlGrey matchers compliant with Chromium style.

ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_controller_egtest.mm

Index: ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_controller_egtest.mm
diff --git a/ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_controller_egtest.mm b/ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_controller_egtest.mm
index 3b0db053980be8741451265b7f2bb1f135f47ad0..2ef4965bd5c95d4246108ef6536e3bf6050c3411 100644
--- a/ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_controller_egtest.mm
+++ b/ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_controller_egtest.mm
@@ -49,20 +49,15 @@ void CloseRecentTabsPanelOnIphone() {
 }
 
 // Returns the matcher for the entry of the page in the recent tabs panel.
-id<GREYMatcher> titleOfTestPageMatcher() {
+id<GREYMatcher> TitleOfTestPage() {
   return grey_allOf(
-      chrome_test_util::staticTextWithAccessibilityLabel(kTitleOfTestPage),
+      chrome_test_util::StaticTextWithAccessibilityLabel(kTitleOfTestPage),
       grey_sufficientlyVisible(), nil);
 }
 
-// Returns the matcher for the back button.
-id<GREYMatcher> backButtonMatcher() {
-  return chrome_test_util::buttonWithAccessibilityLabelId(IDS_ACCNAME_BACK);
-}
-
 // Returns the matcher for the Recently closed label.
-id<GREYMatcher> recentlyClosedLabelMatcher() {
-  return chrome_test_util::staticTextWithAccessibilityLabelId(
+id<GREYMatcher> RecentlyClosedLabelMatcher() {
+  return chrome_test_util::StaticTextWithAccessibilityLabelId(
       IDS_IOS_RECENT_TABS_RECENTLY_CLOSED);
 }
 
@@ -87,14 +82,14 @@ id<GREYMatcher> recentlyClosedLabelMatcher() {
   if (IsIPadIdiom()) {
     chrome_test_util::OpenNewTab();
     NSError* error = nil;
-    [[EarlGrey selectElementWithMatcher:recentlyClosedLabelMatcher()]
+    [[EarlGrey selectElementWithMatcher:RecentlyClosedLabelMatcher()]
         assertWithMatcher:grey_notNil()
                     error:&error];
     // If the Recent Tabs panel is shown, then switch back to the Most Visited
     // panel so that tabs opened in other tests will show the Most Visited panel
     // instead of the Recent Tabs panel.
     if (!error) {
-      [[EarlGrey selectElementWithMatcher:recentlyClosedLabelMatcher()]
+      [[EarlGrey selectElementWithMatcher:RecentlyClosedLabelMatcher()]
           performAction:grey_swipeFastInDirection(kGREYDirectionRight)];
     }
     chrome_test_util::CloseCurrentTab();
@@ -109,21 +104,21 @@ id<GREYMatcher> recentlyClosedLabelMatcher() {
   // Open the test page in a new tab.
   [ChromeEarlGrey loadURL:testPageURL];
   id<GREYMatcher> webViewMatcher =
-      chrome_test_util::webViewContainingText("hello");
+      chrome_test_util::WebViewContainingText("hello");
   [[EarlGrey selectElementWithMatcher:webViewMatcher]
       assertWithMatcher:grey_notNil()];
 
   // Open the Recent Tabs panel, check that the test page is not
   // present.
   OpenRecentTabsPanel();
-  [[EarlGrey selectElementWithMatcher:titleOfTestPageMatcher()]
+  [[EarlGrey selectElementWithMatcher:TitleOfTestPage()]
       assertWithMatcher:grey_nil()];
 
   // Get rid of the Recent Tabs Panel.
   if (IsIPadIdiom()) {
     // On iPad, the Recent Tabs panel is a new page in the navigation history.
     // Go back to the previous page to restore the test page.
-    [[EarlGrey selectElementWithMatcher:backButtonMatcher()]
+    [[EarlGrey selectElementWithMatcher:chrome_test_util::BackButton()]
         performAction:grey_tap()];
     [ChromeEarlGrey waitForPageToFinishLoading];
   } else {
@@ -139,15 +134,15 @@ id<GREYMatcher> recentlyClosedLabelMatcher() {
 
   // Open the Recent Tabs panel and check that the test page is present.
   OpenRecentTabsPanel();
-  [[EarlGrey selectElementWithMatcher:titleOfTestPageMatcher()]
+  [[EarlGrey selectElementWithMatcher:TitleOfTestPage()]
       assertWithMatcher:grey_notNil()];
 
   // Tap on the entry for the test page in the Recent Tabs panel and check that
   // a tab containing the test page was opened.
-  [[EarlGrey selectElementWithMatcher:titleOfTestPageMatcher()]
+  [[EarlGrey selectElementWithMatcher:TitleOfTestPage()]
       performAction:grey_tap()];
-  [[EarlGrey selectElementWithMatcher:chrome_test_util::omnibox()]
-      assertWithMatcher:chrome_test_util::omniboxText(
+  [[EarlGrey selectElementWithMatcher:chrome_test_util::Omnibox()]
+      assertWithMatcher:chrome_test_util::OmniboxText(
                             testPageURL.GetContent())];
 }