[new downloader][ios] Fixed migration from map on zoomin.

iphone/Maps/Classes/MapViewController.mm

@@ -102,7 +102,8 @@ NSString * const kEditorSegue = @"Map2EditorSegue";
 @end
 
 @interface MapViewController ()<MTRGNativeAppwallAdDelegate, MWMFrameworkRouteBuilderObserver,
-                                MWMFrameworkMyPositionObserver, MWMFrameworkUserMarkObserver>
+                                MWMFrameworkMyPositionObserver, MWMFrameworkUserMarkObserver,
+                                MWMFrameworkDrapeObserver>
 
 @property (nonatomic, readwrite) MWMMapViewControlsManager * controlsManager;
 @property (nonatomic) MWMBottomMenuState menuRestoreState;
@@ -593,6 +594,16 @@ NSString * const kEditorSegue = @"Map2EditorSegue";
   self.forceRoutingStateChange = ForceRoutingStateChangeNone;
 }
 
+#pragma mark - MWMFrameworkDrapeObserver
+
+- (void)processViewportCountryEvent:(TCountryId const &)countryId
+{
+  if (countryId != kInvalidCountryId && platform::migrate::NeedMigrate())
+    [self performSegueWithIdentifier:kMigrationSegue sender:self];
+  else
+    [self.downloadDialog processViewportCountryEvent:countryId];
+}
+
 #pragma mark - MWMFrameworkUserMarkObserver
 
 - (void)processUserMarkEvent:(UserMark const *)mark

iphone/Maps/Classes/Widgets/MWMMapDownloadDialog.h

@@ -4,4 +4,6 @@
 
 + (instancetype)dialogForController:(MWMViewController *)controller;
 
+- (void)processViewportCountryEvent:(TCountryId const &)countryId;
+
 @end

iphone/Maps/Classes/Widgets/MWMMapDownloadDialog.mm

@@ -15,7 +15,7 @@ extern char const * kAutoDownloadEnabledKey;
 
 using namespace storage;
 
-@interface MWMMapDownloadDialog ()<MWMFrameworkDrapeObserver, MWMFrameworkStorageObserver,
+@interface MWMMapDownloadDialog ()<MWMFrameworkStorageObserver,
                                    MWMCircularProgressProtocol>
 @property (weak, nonatomic) IBOutlet UILabel * parentNode;
 @property (weak, nonatomic) IBOutlet UILabel * node;
@@ -160,8 +160,6 @@ using namespace storage;
   self.progressView.state = MWMCircularProgressStateSpinner;
 }
 
-#pragma mark - MWMFrameworkDrapeObserver
-
 - (void)processViewportCountryEvent:(TCountryId const &)countryId
 {
   if (m_countryId == countryId)