Move testEvictedTabReloadFailure to an external URL egtest target.

ios/chrome/browser/metrics/tab_usage_recorder_test_util.mm

Index: ios/chrome/browser/metrics/tab_usage_recorder_test_util.mm
diff --git a/ios/chrome/browser/metrics/tab_usage_recorder_test_util.mm b/ios/chrome/browser/metrics/tab_usage_recorder_test_util.mm
new file mode 100644
index 0000000000000000000000000000000000000000..cc29e2f4ec97720e619048395252dc3018ca06e8
--- /dev/null
+++ b/ios/chrome/browser/metrics/tab_usage_recorder_test_util.mm
@@ -0,0 +1,94 @@
+// Copyright 2017 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.
+
+#include "ios/chrome/browser/metrics/tab_usage_recorder_test_util.h"
+
+#import <Foundation/Foundation.h>
+
+#import "base/ios/block_types.h"
+#include "ios/chrome/browser/ui/tools_menu/tools_menu_constants.h"
+#include "ios/chrome/browser/ui/ui_util.h"
+#include "ios/chrome/grit/ios_strings.h"
+#import "ios/chrome/test/app/tab_test_util.h"
+#import "ios/chrome/test/earl_grey/chrome_assertions.h"
+#import "ios/chrome/test/earl_grey/chrome_earl_grey_ui.h"
+#import "ios/chrome/test/earl_grey/chrome_matchers.h"
+#import "ios/testing/wait_util.h"
+#include "ui/base/l10n/l10n_util_mac.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+namespace {
+
+// The delay to wait for an element to appear before tapping on it.
+const NSTimeInterval kWaitElementTimeout = 3;
+
+// Closes the tabs switcher.
+void CloseTabSwitcher() {
+  id<GREYMatcher> matcher = chrome_test_util::ButtonWithAccessibilityLabelId(
+      IDS_IOS_TAB_STRIP_LEAVE_TAB_SWITCHER);
+  [[EarlGrey selectElementWithMatcher:matcher] performAction:grey_tap()];
+}
+
+}  // namespace
+
+namespace tab_usage_recorder_test_util {
+
+void OpenNewIncognitoTabUsingUIAndEvictMainTabs() {
+  int nb_incognito_tab = chrome_test_util::GetIncognitoTabCount();
+  [ChromeEarlGreyUI openToolsMenu];
+  id<GREYMatcher> new_incognito_tab_button_matcher =
+      grey_accessibilityID(kToolsMenuNewIncognitoTabId);
+  [[EarlGrey selectElementWithMatcher:new_incognito_tab_button_matcher]
+      performAction:grey_tap()];
+  chrome_test_util::AssertIncognitoTabCount(nb_incognito_tab + 1);
+  ConditionBlock condition = ^bool {
+    return chrome_test_util::IsIncognitoMode();
+  };
+  GREYAssert(
+      testing::WaitUntilConditionOrTimeout(kWaitElementTimeout, condition),
+      @"Waiting switch to incognito mode.");
+  chrome_test_util::EvictOtherTabModelTabs();
+}
+
+void SwitchToNormalMode() {
+  GREYAssertTrue(chrome_test_util::IsIncognitoMode(),
+                 @"Switching to normal mode is only allowed from Incognito.");
+  if (IsIPadIdiom()) {
+    // Enter the tab switcher.
+    id<GREYMatcher> tabSwitcherEnterButton = grey_accessibilityLabel(
+        l10n_util::GetNSStringWithFixup(IDS_IOS_TAB_STRIP_ENTER_TAB_SWITCHER));
+    [[EarlGrey selectElementWithMatcher:tabSwitcherEnterButton]
+        performAction:grey_tap()];
+
+    // Select the non incognito panel.
+    id<GREYMatcher> tabSwitcherHeaderPanelButton =
+        grey_accessibilityLabel(l10n_util::GetNSStringWithFixup(
+            IDS_IOS_TAB_SWITCHER_HEADER_NON_INCOGNITO_TABS));
+    [[EarlGrey selectElementWithMatcher:tabSwitcherHeaderPanelButton]
+        performAction:grey_tap()];
+
+    // Leave the tab switcher.
+    CloseTabSwitcher();
+  } else {
+    [[EarlGrey selectElementWithMatcher:chrome_test_util::ShowTabsButton()]
+        performAction:grey_tap()];
+    [[EarlGrey selectElementWithMatcher:
+                   chrome_test_util::ButtonWithAccessibilityLabelId(
+                       IDS_IOS_TOOLS_MENU_NEW_INCOGNITO_TAB)]
+        performAction:grey_swipeSlowInDirection(kGREYDirectionRight)];
+    [[EarlGrey selectElementWithMatcher:chrome_test_util::ShowTabsButton()]
+        performAction:grey_tap()];
+  }
+  ConditionBlock condition = ^bool {
+    return !chrome_test_util::IsIncognitoMode();
+  };
+  GREYAssert(
+      testing::WaitUntilConditionOrTimeout(kWaitElementTimeout, condition),
+      @"Waiting switch to normal mode.");
+}
+
+}  // namespace tab_usage_recorder_test_util