Hide the main window when Set-As-Default dialog is present.

chrome/browser/ui/startup/startup_browser_creator.h

Index: chrome/browser/ui/startup/startup_browser_creator.h
diff --git a/chrome/browser/ui/startup/startup_browser_creator.h b/chrome/browser/ui/startup/startup_browser_creator.h
index 7d5b786958f107705129fca70e55fce0719a4c21..ea6b24fb705b4d3ae2d21e7b9b35c17ee35618fc 100644
--- a/chrome/browser/ui/startup/startup_browser_creator.h
+++ b/chrome/browser/ui/startup/startup_browser_creator.h
@@ -91,6 +91,14 @@ class StartupBrowserCreator {
     return is_default_browser_dialog_suppressed_;
   }
 
+  void set_show_main_browser_window(bool show_main_browser_window) {
+    show_main_browser_window_ = show_main_browser_window;
+  }
+
+  bool show_main_browser_window() const {
+    return show_main_browser_window_;
+  }
+
  private:
   friend class CloudPrintProxyPolicyTest;
   friend class CloudPrintProxyPolicyStartupTest;
@@ -131,6 +139,10 @@ class StartupBrowserCreator {
   // first-run when the dialog has been suppressed.
   bool is_default_browser_dialog_suppressed_;
 
+  // Whether the browser window should be shown immediately after it has been
+  // created. Default is true.
+  bool show_main_browser_window_;
+
   // True if we have already read and reset the preference kWasRestarted. (A
   // member variable instead of a static variable inside WasRestarted because
   // of testing.)