[ios] Update privacy notice url.

Bug: 786913
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I7c5ead72b584672fd322d9b74a0b24b40d958797
Reviewed-on: https://chromium-review.googlesource.com/882061
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Peter Lee <pkl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532718}

ios/chrome/browser/ui/first_run/welcome_to_chrome_view_controller.mm

@@ -185,7 +185,7 @@ const BOOL kDefaultStatsCheckboxValue = YES;
   self.didTapPrivacyLink = YES;
   NSString* title = l10n_util::GetNSString(IDS_IOS_FIRSTRUN_PRIVACY_TITLE);
   NSURL* privacyUrl = net::NSURLWithGURL(
-      GURL("https://www.google.com/chrome/browser/privacy/"));
+      GURL("https://www.google.com/chrome/privacy-plain.html"));
   [self openStaticFileWithURL:privacyUrl title:title];
   [self.navigationController setDelegate:self];
 }