Refactoring startup logic for upcoming FRE changes (non-Win 10).

chrome/browser/ui/startup/startup_tab_provider.h

Index: chrome/browser/ui/startup/startup_tab_provider.h
diff --git a/chrome/browser/ui/startup/startup_tab_provider.h b/chrome/browser/ui/startup/startup_tab_provider.h
new file mode 100644
index 0000000000000000000000000000000000000000..5716913c23bb3fef9a1c15abaa4a53b12cd15315
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+++ b/chrome/browser/ui/startup/startup_tab_provider.h
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+// 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.
+
+#ifndef CHROME_BROWSER_UI_STARTUP_STARTUP_TAB_PROVIDER_H_
+#define CHROME_BROWSER_UI_STARTUP_STARTUP_TAB_PROVIDER_H_
+
+#include <vector>
+
+#include "base/gtest_prod_util.h"
+#include "chrome/browser/first_run/first_run.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/startup/startup_browser_creator.h"
+#include "chrome/browser/ui/startup/startup_tab.h"
+#include "url/gurl.h"
+
+// Provides the sets of tabs to be shown at startup for given sets of policy.
+// For instance, this class answers the question, "which tabs, if any, need to
+// be shown for first run/onboarding?" Provided as a virtual interface to allow
+// faking in unit tests.
+class StartupTabProvider {
+ public:
+  // Gathers relevant system state and returns any tabs which should be
+  // shown according to onboarding/first run policy.
+  virtual StartupTabs GetOnboardingTabs() const = 0;
+
+  // Gathers URLs from a Master Preferences file indicating first run logic
+  // specific to this distribution. Transforms any such URLs per policy and
+  // returns them. Also clears the value of first_run_urls_ in the provided
+  // BrowserCreator.
+  virtual StartupTabs GetDistributionFirstRunTabs(
+      StartupBrowserCreator* browser_creator) const = 0;
+
+  // Checks for the presence of a trigger indicating the need to offer a Profile
+  // Reset on this profile. Returns any tabs which should be shown accordingly.
+  virtual StartupTabs GetResetTriggerTabs(Profile* profile) const = 0;
+
+  // Returns the user's pinned tabs.
+  virtual StartupTabs GetPinnedTabs() const = 0;
+
+  // Returns tabs, if any, specified in the user's preferences as the default
+  // content for a new window.
+  virtual StartupTabs GetPreferencesTabs() const = 0;
+};
+
+class StartupTabProviderImpl : public StartupTabProvider {
+ public:
+  StartupTabProviderImpl() = default;
+
+  // The static Check*TabPolicy methods below enforce the policies relevant to
+  // the respective Get*Tabs methods, but do not gather or interact with any
+  // system state relating to making those policy decisions.
+
+  // Determines which tabs which should be shown according to onboarding/first
+  // run policy.
+  static StartupTabs CheckStandardOnboardingTabPolicy(bool is_first_run);
+
+  // Processes first run URLs specified in Master Preferences file, replacing
+  // any "magic word" URL hosts with appropriate URLs.
+  static StartupTabs CheckMasterPrefsTabPolicy(
+      bool is_first_run,
+      const std::vector<GURL>& first_run_tabs);
+
+  // Determines which tabs should be shown as a result of the presence/absence
+  // of a Reset Trigger on this profile.
+  static StartupTabs CheckResetTriggerTabPolicy(bool profile_has_trigger);
+
+  // Gets the URL for the "Welcome to Chrome" page.
+  static GURL GetWelcomePageUrl();
+
+  // Gets the URL for the page which offers to reset the user's profile
+  // settings.
+  static GURL GetTriggeredResetSettingsUrl();
+
+  // StartupTabProvider:
+  StartupTabs GetOnboardingTabs() const override;
+  StartupTabs GetDistributionFirstRunTabs(
+      StartupBrowserCreator* browser_creator) const override;
+  StartupTabs GetResetTriggerTabs(Profile* profile) const override;
+  StartupTabs GetPinnedTabs() const override;
+  StartupTabs GetPreferencesTabs() const override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(StartupTabProviderImpl);
+};
+
+#endif  // CHROME_BROWSER_UI_STARTUP_STARTUP_TAB_PROVIDER_H_