[iOS] Add Request Mobile Site cell to tools menu

ios/chrome/browser/ui/browser_view_controller.mm

Index: ios/chrome/browser/ui/browser_view_controller.mm
diff --git a/ios/chrome/browser/ui/browser_view_controller.mm b/ios/chrome/browser/ui/browser_view_controller.mm
index 9b3b3afa3ff9a8cbe9cf40f7fc6d4b47c8adb8b0..b49bd69cbe4351e708fbc9fa503134a7d3a02507 100644
--- a/ios/chrome/browser/ui/browser_view_controller.mm
+++ b/ios/chrome/browser/ui/browser_view_controller.mm
@@ -3293,10 +3293,14 @@ - (void)showToolsMenuPopup {
     [toolsPopupController setIsCurrentPageBookmarked:isBookmarked];
     [toolsPopupController setCanShowFindBar:self.canShowFindBar];
     [toolsPopupController setCanUseReaderMode:self.canUseReaderMode];
-    [toolsPopupController
-        setCanUseDesktopUserAgent:self.canUseDesktopUserAgent];
     [toolsPopupController setCanShowShareMenu:self.canShowShareMenu];
 
+    web::UserAgentType userAgentType = [_model currentTab]
+                                           .webState->GetNavigationManager()
+                                           ->GetVisibleItem()

[kkhorimoto, 2017/02/27 23:44:24]

It's a bug, but I believe there are some instances where GetVisibleItem() might
return a nullptr.  This can happen if you cancel a pending load when it was
opened in a new Tab (or via window.open).  Let's just use NONE as a default
value if there is no visible item.

[liaoyuke, 2017/02/28 02:01:00]

Done.

+                                           ->GetUserAgentType();
+    [toolsPopupController setUserAgentType:userAgentType];

[kkhorimoto, 2017/02/27 23:44:24]

Let's use dot notation since this is a property now.

[liaoyuke, 2017/02/28 02:01:00]

Done.

+
     if (!IsIPadIdiom())
       [toolsPopupController setIsTabLoading:_toolbarModelIOS->IsLoading()];
   }