Completing refactor of startup_browser_creator_impl

chrome/browser/ui/startup/startup_browser_creator_impl.h

Index: chrome/browser/ui/startup/startup_browser_creator_impl.h
diff --git a/chrome/browser/ui/startup/startup_browser_creator_impl.h b/chrome/browser/ui/startup/startup_browser_creator_impl.h
index 7cc98d360d1c914372b1b10d7b955511c1bb9ae2..978ed4eda0716b0317e7ce05283e774b5a3c034e 100644
--- a/chrome/browser/ui/startup/startup_browser_creator_impl.h
+++ b/chrome/browser/ui/startup/startup_browser_creator_impl.h
@@ -84,6 +84,12 @@ class StartupBrowserCreatorImpl {
     FIRST_RUN_LAST_TAB,  // Inject the welcome page as the last first-run tab.
   };
 
+  enum class BrowserOpenBehavior {
+    NEW,                  // Open in a new browser.
+    SYNCHRONOUS_RESTORE,  // Attempt a synchronous session restore.
+    USE_EXISTING,         // Attempt to add to an existing tabbed browser.
+  };
+
   // Creates a tab for each of the Tabs in |tabs|. If browser is non-null
   // and a tabbed browser, the tabs are added to it. Otherwise a new tabbed
   // browser is created and the tabs are added to it. The browser the tabs
@@ -122,6 +128,40 @@ class StartupBrowserCreatorImpl {
                                    bool is_incognito,
                                    bool is_post_crash_launch);
 
+  // Begins an asynchronous session restore if current state allows it (e.g.,
+  // this is not process startup) and SessionService indicates that one is
+  // necessary. Returns true if restore was initiated, or false if launch
+  // should continue (either synchronously, or asynchronously without
+  // restoring).
+  bool MaybeAsyncRestore(const StartupTabs& tabs,
+                         bool process_startup,
+                         bool is_post_crash_launch);
+
+  // Returns a browser displaying the contents of |tabs|. Based on |behavior|,
+  // this may attempt a session restore or create a new browser. May also allow
+  // DOM Storage to begin cleanup once it's clear it is not needed anymore.
+  Browser* RestoreOrCreateBrowser(const StartupTabs& tabs,
+                                  BrowserOpenBehavior behavior,
+                                  uint32_t restore_options,
+                                  bool process_startup,
+                                  bool is_post_crash_launch);
+
+  // Determines how the launch flow should obtain a Browser.
+  static BrowserOpenBehavior DetermineBrowserOpenBehavior(
+      const SessionStartupPref& pref,
+      bool process_startup,
+      bool is_post_crash_launch,
+      bool has_restore_switch,
+      bool has_new_window_switch,
+      bool has_cmd_line_tabs);
+
+  // Populates and returns the relevant bitmask options which must be passed
+  // when restoring a session.
+  static uint32_t DetermineSynchronousRestoreOptions(
+      bool has_create_browser_default,
+      bool has_create_browser_switch,
+      bool was_mac_login_or_resume);
+
   // Adds a Tab to |tabs| for each url in |urls| that doesn't already exist
   // in |tabs|.
   void AddUniqueURLs(const std::vector<GURL>& urls, StartupTabs* tabs);