Remove unimplemented methods from browser_process_impl.h

browser_process_impl.h contains declarations for CreateStatusTrayManager(),
CreateSafeBrowsingDetectionService() and CreateViewedPageTracker() methods,
whose implementations have since been removed. This CL removes these unused
declarations and add check for private field created_notification_ui_manager_.

Bug:

Change-Id: If9337bae7a5fc20a5fcc1a98c42e53e803102660
Reviewed-on: https://chromium-review.googlesource.com/892685
Commit-Queue: Scott Violet <sky@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533334}

chrome/browser/browser_process_impl.h

@@ -174,16 +174,13 @@ class BrowserProcessImpl : public BrowserProcess,
   void CreateWatchdogThread();
   void CreateProfileManager();
   void CreateLocalState();
-  void CreateViewedPageTracker();
   void CreateIconManager();
   void CreateIntranetRedirectDetector();
   void CreateNotificationPlatformBridge();
   void CreateNotificationUIManager();
-  void CreateStatusTrayManager();
   void CreatePrintPreviewDialogController();
   void CreateBackgroundPrintingManager();
   void CreateSafeBrowsingService();
-  void CreateSafeBrowsingDetectionService();
   void CreateSubresourceFilterRulesetService();
   void CreateOptimizationGuideService();
   void CreateStatusTray();
@@ -259,9 +256,11 @@ class BrowserProcessImpl : public BrowserProcess,
       background_printing_manager_;
 #endif
 
+#if !defined(OS_ANDROID)
   // Manager for desktop notification UI.
   bool created_notification_ui_manager_ = false;
   std::unique_ptr<NotificationUIManager> notification_ui_manager_;
+#endif
 
   std::unique_ptr<IntranetRedirectDetector> intranet_redirect_detector_;