Not showing Site settings button for Guest mode

In Guest mode, Site Settings link found in the Page info bubble, leads to
chrome://settings/, not to the site content settings, as the content settings
are not visible.

Changes:
-Removed the Site Settings button from guest mode.

Note: Enabling just the Site Settings would require a complicated refactoring
of privacy section.

Bug: 823703
Change-Id: Ie3f6ecb3c7b11eeb7652808eefb8608222525830
Reviewed-on: https://chromium-review.googlesource.com/1185097
Commit-Queue: Kamila Hasanbega <hkamila@google.com>
Reviewed-by: Christian Dullweber <dullweber@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#585773}

chrome/browser/ui/views/page_info/page_info_bubble_view.cc

@@ -530,7 +530,8 @@ PageInfoBubbleView::PageInfoBubbleView(
 
   layout->StartRowWithPadding(views::GridLayout::kFixedSize, kColumnId,
                               views::GridLayout::kFixedSize, 0);
-  layout->AddView(CreateSiteSettingsLink(side_margin, this).release());
+  if (!profile->IsGuestSession())
+    layout->AddView(CreateSiteSettingsLink(side_margin, this).release());
 
   views::BubbleDialogDelegateView::CreateBubble(this);
   presenter_.reset(new PageInfo(