Add the suggestions UI in chrome

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 31d9288756f9cc645d642ea12c8233fa411457e2..79574e5cad74dbbd1809dde7e1ca28700a61b25a 100644
--- a/ios/chrome/browser/ui/browser_view_controller.mm
+++ b/ios/chrome/browser/ui/browser_view_controller.mm
@@ -75,6 +75,7 @@
 #import "ios/chrome/browser/snapshots/snapshot_overlay.h"
 #import "ios/chrome/browser/snapshots/snapshot_overlay_provider.h"
 #import "ios/chrome/browser/storekit_launcher.h"
+#import "ios/chrome/browser/suggestions/suggestions_coordinator.h"
 #import "ios/chrome/browser/tabs/tab.h"
 #import "ios/chrome/browser/tabs/tab_dialog_delegate.h"
 #import "ios/chrome/browser/tabs/tab_headers_delegate.h"
@@ -387,6 +388,9 @@ NSString* const kReadingListSnackbarCategory = @"ReadingListSnackbarCategory";
   // Used to display the QR Scanner UI. Nil if not visible.
   base::scoped_nsobject<QRScannerViewController> _qrScannerViewController;
 
+  // Used to display the Suggestions.
+  base::scoped_nsobject<SuggestionsCoordinator> _suggestionsCoordinator;
+
   // Used to display the Find In Page UI. Nil if not visible.
   base::scoped_nsobject<FindBarControllerIOS> _findBarController;
 
@@ -4101,6 +4105,11 @@ class BrowserBookmarkModelBridge : public bookmarks::BookmarkModelObserver {
         [self showQRScanner];
       }
       break;
+    case IDC_SHOW_SUGGESTIONS_UI:
+      if (experimental_flags::IsSuggestionsUIEnabled()) {
+        [self showSuggestionsUI];
+      }
+      break;
     default:
       // Unknown commands get sent up the responder chain.
       [super chromeExecuteCommand:sender];
@@ -4365,6 +4374,14 @@ class BrowserBookmarkModelBridge : public bookmarks::BookmarkModelObserver {
                    completion:nil];
 }
 
+- (void)showSuggestionsUI {

[lpromero, 2017/01/18 13:32:15]

This could be called twice in a row (for example when the UI is lagging and the
user taps twice, thinking the first one didn't get called). In that case, we
seem to call -start twice, no?

[gambard, 2017/01/18 14:34:47]

Fixed in the coordinator.

+  if (!_suggestionsCoordinator) {
+    _suggestionsCoordinator.reset(
+        [[SuggestionsCoordinator alloc] initWithBaseViewController:self]);
+  }
+  [_suggestionsCoordinator start];
+}
+
 - (void)showNTPPanel:(NewTabPage::PanelIdentifier)panel {
   DCHECK(self.visible || self.dismissingModal);
   GURL url(kChromeUINewTabURL);