[ios] Revert fakebox animation change for pre-UI refresh.

Bug: 865408
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I43ace7047750f8754cf6882d35fd598c3fffda3a
Reviewed-on: https://chromium-review.googlesource.com/1146209Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577139}

ios/chrome/browser/ui/content_suggestions/content_suggestions_header_view_controller.mm

@@ -386,7 +386,11 @@ const UIEdgeInsets kSearchBoxStretchInsets = {3, 3, 3, 3};
 }
 
 - (void)fakeOmniboxTapped:(id)sender {
-  [self shiftTilesUp];
+  if (IsUIRefreshPhase1Enabled()) {
+    [self shiftTilesUp];
+  } else {
+    [self.dispatcher focusFakebox];
+  }
 }
 
 // If Google is not the default search engine, hide the logo, doodle and
@@ -446,7 +450,9 @@ const UIEdgeInsets kSearchBoxStretchInsets = {3, 3, 3, 3};
 
 - (void)shiftTilesUp {
   void (^completionBlock)() = ^{
-    [self.dispatcher focusFakebox];
+    if (IsUIRefreshPhase1Enabled()) {
+      [self.dispatcher focusFakebox];
+    }
     if ((IsUIRefreshPhase1Enabled() && IsSplitToolbarMode()) ||
         (!IsUIRefreshPhase1Enabled() &&
          !content_suggestions::IsRegularXRegularSizeClass(self.view))) {
@@ -502,7 +508,7 @@ const UIEdgeInsets kSearchBoxStretchInsets = {3, 3, 3, 3};
 
   self.omniboxFocused = YES;
 
-  if (![self.delegate isScrolledToTop])
+  if (!IsUIRefreshPhase1Enabled() || ![self.delegate isScrolledToTop])
     [self shiftTilesUp];
 }